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after decades of observations of solar energetic particles from space-based observatories, relevant questions on particle injection, transport, and acceleration remain open. to address these scientific topics, accurate measurements of the particle properties in the inner heliosphere are needed. in this paper we describ... | the energetic particle detector. energetic particle instrument suite for the solar orbiter mission |
observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (cmb), galactic emissions, and the compton-$y$ distortion due to the thermal sunyaev-zel'dovich (tsz) effect. extracting new insight into cosmological and astrophysical questions o... | the atacama cosmology telescope: high-resolution component-separated maps across one-third of the sky |
we investigate the impact of astrophysical systematics on cosmic shear cosmological parameter constraints from the canada-france-hawaii telescope lensing survey (cfhtlens) and the concordance with cosmic microwave background measurements by planck. we present updated cfhtlens cosmic shear tomography measurements extend... | cfhtlens revisited: assessing concordance with planck including astrophysical systematics |
with the hubble frontier fields program, gravitational lensing has provided a powerful way to extend the study of the ultraviolet luminosity function (lf) of galaxies at z ∼ 6 down to unprecedented magnitude limits. at the same time, significant discrepancies between different studies were found at the very faint end o... | the extreme faint end of the uv luminosity function at z ∼ 6 through gravitational telescopes: a comprehensive assessment of strong lensing uncertainties |
the interpretation of present and future neutrino experiments requires accurate theoretical predictions for neutrino-nucleus scattering rates. neutrino structure functions can be reliably evaluated in the deep-inelastic scattering regime within the perturbative qcd (pqcd) framework. at low momentum transfers (q2 ≲ few ... | neutrino structure functions from gev to eev energies |
combining high time and frequency resolution full-polarization spectra of fast radio bursts (frbs) with knowledge of their host galaxy properties provides an opportunity to study both the emission mechanism generating them and the impact of their propagation through their local environment, host galaxy, and the interga... | high time resolution and polarization properties of askap-localized fast radio bursts |
this paper presents and summarizes a software package (“lpipe”) for completely automated, end-to-end reduction of both bright and faint sources with the low resolution imaging spectrometer (lris) at keck observatory. it supports all gratings, grisms, and dichroics, and also reduces imaging observations, although it doe... | fully automated reduction of longslit spectroscopy with the low resolution imaging spectrometer at the keck observatory |
we explore strategies to extract cosmological constraints from a joint analysis of cosmic shear, galaxy-galaxy lensing, galaxy clustering, cluster number counts and cluster weak lensing. we utilize the cosmolike software to simulate results from a large synoptic survey telescope (lsst) like data set, specifically, we (... | cosmolike - cosmological likelihood analyses for photometric galaxy surveys |
we develop a sophisticated model of fast radio burst (frb) observations, accounting for the intrinsic cosmological gas distribution and host galaxy contributions, and give the most detailed account yet of observational biases due to burst width, dispersion measure, and the exact telescope beamshape. our results offer a... | the z-dm distribution of fast radio bursts |
the totem collaboration has measured the proton-proton total cross section at √{s}=13 tev with a luminosity-independent method. using dedicated β ^{*}=90 m beam optics, the roman pots were inserted very close to the beam. the inelastic scattering rate has been measured by the t1 and t2 telescopes during the same lhc fi... | first measurement of elastic, inelastic and total cross-section at √{s}=13 tev by totem and overview of cross-section data at lhc energies |
we present a catalog of sources detected above 50 gev by the fermi-large area telescope (lat) in 80 months of data. the newly delivered pass 8 event-level analysis allows the detection and characterization of sources in the 50 gev-2 tev energy range. in this energy band, fermi-lat has detected 360 sources, which consti... | 2fhl: the second catalog of hard fermi-lat sources |
we report the detection of the lyman continuum (lyc) radiation of the compact star-forming galaxy (sfg) j1154+2443 observed with the cosmic origins spectrograph (cos) onboard the hubble space telescope. this galaxy, at a redshift of z = 0.3690, is characterized by a high emission-line flux ratio o32 = [o iii] λ5007/[o ... | j1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of lyman continuum photons |
this paper describes the third public data release (dr3) of the calar alto legacy integral field area (califa) survey. science-grade quality data for 667 galaxies are made public, including the 200 galaxies of the second public data release (dr2). data were obtained with the integral-field spectrograph pmas/ppak mounte... | califa, the calar alto legacy integral field area survey. iv. third public data release |
we identify four unusually bright (h {}160,{ab} < 25.5) galaxies from hubble space telescope (hst) and spitzer candels data with probable redshifts z ∼ 7-9. these identifications include the brightest-known galaxies to date at z ≳ 7.5. as y-band observations are not available over the full candels program to perform... | z ≳ 7 galaxies with red spitzer/irac [3.6]-[4.5] colors in the full candels data set: the brightest-known galaxies at z ~ 7-9 and a probable spectroscopic confirmation at z = 7.48 |
this paper describes the detailed design of the ccd dewar and the camera system which is a part of the wide-field imager hyper suprime-cam (hsc) on the 8.2 m subaru telescope. on the 1.°5 diameter focal plane (497 mm in physical size), 116 four-side buttable 2 k × 4 k fully depleted ccds are tiled with 0.3 mm gaps betw... | hyper suprime-cam: camera dewar design |
the coherent neutrino-nucleus interaction experiment (connie) is taking data at the angra 2 nuclear reactor with the aim of detecting the coherent elastic scattering of reactor antineutrinos with silicon nuclei using charge-coupled devices (ccds). in 2019 the experiment operated with a hardware binning applied to the r... | search for coherent elastic neutrino-nucleus scattering at a nuclear reactor with connie 2019 data |
recent work, based on data from the hubble space telescope (hst ) uv legacy survey of galactic globular clusters (gcs), has revealed that all the analysed clusters host two groups of first- (1g) and second-generation (2g) stars. in most gcs, both 1g and 2g stars host substellar populations with different chemical compo... | the hubble space telescope uv legacy survey of galactic globular clusters - xvi. the helium abundance of multiple populations |
the concept of the oos of spacecraft can be traced back to the 1960s, when the main focus was on providing the necessary maintenance to advance the lifetime of spacecraft and extending the scale and function through on-orbit assembly. during the past decades, the hubble space telescope has made great contributions to t... | on-orbit service (oos) of spacecraft: a review of engineering developments |
the icecube neutrino telescope at the south pole has measured the atmospheric muon neutrino spectrum as a function of zenith angle and energy in the approximate 320 gev to 20 tev range, to search for the oscillation signatures of light sterile neutrinos. no evidence for anomalous νμ or ν¯μ disappearance is observed in ... | searches for sterile neutrinos with the icecube detector |
we present a census of ionized gas outflows in 599 normal galaxies at redshift 0.6 < z < 2.7, mostly based on integral field spectroscopy of hα, [n ii], and [s ii] line emission. the sample fairly homogeneously covers the main sequence of star-forming galaxies with masses 9.0 < log(m */m ⊙) < 11.7, and prob... | the kmos3d survey: demographics and properties of galactic outflows at z = 0.6-2.7 |
the recent observation by the icecube experiment of cosmic neutrinos at energies up to a few pev heralds the beginning of neutrino astronomy. at such high energies, the `conventional' neutrino flux is suppressed and the `prompt' component from charm meson decays is expected to become the dominant background to astrophy... | charm production in the forward region: constraints on the small- x gluon and backgrounds for neutrino astronomy |
variational quantum algorithms (vqas) offer a promising path toward using near-term quantum hardware for applications in academic and industrial research. these algorithms aim to find approximate solutions to quantum problems by optimizing a parametrized quantum circuit using a classical optimization algorithm. a succe... | performance comparison of optimization methods on variational quantum algorithms |
the james webb space telescope (jwst) is expected to observe galaxies at z > 10 that are presently inaccessible. here, we use a self-consistent empirical model, the universemachine, to generate mock galaxy catalogues and light-cones over the redshift range z = 0-15. these data include realistic galaxy properties (st... | the universe at z > 10: predictions for jwst from the universemachine dr1 |
imaging can take many forms—from optical microscopes and telescopes through ultrasonography to x-ray tomography. however, regardless of the imaging modality, the presence of a complex heterogeneous structure between the imaging system and the scene of interest limits the quality of the images that can be conventionally... | imaging in complex media |
galactic archaeology based on star counts is instrumental to reconstruct the past mass assembly of local group galaxies. the development of new observing techniques and data reduction, coupled with the use of sensitive large field of view cameras, now allows us to pursue this technique in more distant galaxies exploiti... | the atlas3d project - xxix. the new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images |
we report the detection, for the first time in space, of a new non-functionalised hydrocarbon cycle in the direction of tmc-1: o-c6h4 (ortho-benzyne). we derive a column density for this hydrocarbon cycle of (5.0 ± 1.0) × 1011 cm−2. the abundance of this species is around 30 times lower than that of cyclopentadiene and... | discovery of benzyne, o-c6h4, in tmc-1 with the quijote line survey |
we present ground-based optical photometric monitoring data for ngc 5548, part of an extended multiwavelength reverberation mapping campaign. the light curves have nearly daily cadence from 2014 january to july in nine filters (bvri and ugriz). combined with ultraviolet data from the hubble space telescope and swift, w... | space telescope and optical reverberation mapping project. iii. optical continuum emission and broadband time delays in ngc 5548 |
we report the observations of frb 20220912a using the five-hundred-meter aperture spherical radio telescope. we conducted 17 observations totaling 8.67 hr and detected a total of 1076 bursts with an event rate up to 390 hr-1. the cumulative energy distribution can be well described using a broken power-law function wit... | fast observations of frb 20220912a: burst properties and polarization characteristics |
different applications require different customizations of silicon photomultiplier (sipm) technology. we present a review on the latest sipm technologies developed at fondazione bruno kessler (fbk, trento), characterized by a peak detection efficiency in the near-uv and customized according to the needs of different ap... | nuv-sensitive silicon photomultiplier technologies developed at fondazione bruno kessler |
pharmaceutical manufacturing typically uses batch processing at multiple locations. disadvantages of this approach include long production times and the potential for supply chain disruptions. as a preliminary demonstration of an alternative approach, we report here the continuous-flow synthesis and formulation of acti... | on-demand continuous-flow production of pharmaceuticals in a compact, reconfigurable system |
we present a new, publicly available library of dust spectral energy distributions (seds). these seds are characterized by only three parameters: the dust mass (mdust), the dust temperature (tdust), and the mid-to-total infrared color (ir8 ≡ lir/l8). the latter measures the relative contribution of polycyclic aromatic ... | dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0 < z < 4 |
observations of high-redshift galaxies provide a critical direct test to the theories of early galaxy formation, yet to date, only three have been spectroscopically confirmed at z > 12. due to strong gravitational lensing over a wide area, the galaxy cluster field a2744 is ideal for searching for the earliest galaxi... | uncover: illuminating the early universe-jwst/nirspec confirmation of z > 12 galaxies |
we present a sample of four emission-line galaxies at z = 6.11-6.35 that were serendipitously discovered using the commissioning data for the james webb space telescope (jwst)/nircam wide-field slitless spectroscopy mode. one of them (at z = 6.11) has been reported previously, while the others are new discoveries. thes... | first sample of hα+[o iii]λ5007 line emitters at z > 6 through jwst/nircam slitless spectroscopy: physical properties and line-luminosity functions |
we present 41 bursts from the first repeating fast radio burst (frb) discovered (frb 121102). a deep search has allowed us to probe unprecedentedly low burst energies during two consecutive observations (separated by one day) using the arecibo telescope at 1.4 ghz. the bursts are generally detected in less than one-thi... | a sample of low-energy bursts from frb 121102 |
context. data from ground-based, high-resolution solar telescopes can only be used for science with calibrations and processing, which requires detailed knowledge about the instrumentation. space-based solar telescopes provide science-ready data, which are easier to work with for researchers whose expertise is in the i... | sstred: data- and metadata-processing pipeline for chromis and crisp |
we have developed an automated quick data analysis system for data quality assurance (qa) for hyper suprime-cam (hsc). the system was commissioned in 2012-2014, and has been offered for general observations, including the hsc subaru strategic program, since 2014 march. the system provides observers with data quality in... | the on-site quality-assurance system for hyper suprime-cam: osqah |
we measure the low-j co line ratios r 21 ≡ co (2-1)/co (1-0), r 32 ≡ co (3-2)/co (2-1), and r 31 ≡co (3-2)/co (1-0) using whole-disk co maps of nearby galaxies. we draw co (2-1) from phangs-alma, heracles, and follow-up iram surveys; co (1-0) from coming and the nobeyama co atlas of nearby spiral galaxies; and co (3-2)... | low-j co line ratios from single-dish co mapping surveys and phangs-alma |
we forecast the scientific capabilities to improve our understanding of cosmic inflation of core, a proposed cmb space satellite submitted in response to the esa fifth call for a medium-size mission opportunity. the core satellite will map the cmb anisotropies in temperature and polarization in 19 frequency channels sp... | exploring cosmic origins with core: inflation |
the thermal and kinematic sunyaev-zel'dovich effects (tsz, ksz) probe the thermodynamic properties of the circumgalactic and intracluster medium (cgm and icm) of galaxies, groups, and clusters, since they are proportional, respectively, to the integrated electron pressure and momentum along the line of sight. we presen... | atacama cosmology telescope: modeling the gas thermodynamics in boss cmass galaxies from kinematic and thermal sunyaev-zel'dovich measurements |
breakthrough starshot is an initiative to prove ultra-fast light-driven nanocrafts, and lay the foundations for a first launch to alpha centauri within the next generation. along the way, the project could generate important supplementary benefits to solar system exploration. a number of hard engineering challenges rem... | the breakthrough starshot system model |
we present the pristine survey, a new narrow-band photometric survey focused on the metallicity-sensitive ca h&k lines and conducted in the northern hemisphere with the wide-field imager megacam on the canada-france-hawaii telescope. this paper reviews our overall survey strategy and discusses the data processing a... | the pristine survey - i. mining the galaxy for the most metal-poor stars |
we discuss the spectral energy distributions and physical properties of six galaxies whose photometric redshifts suggest they lie beyond a redshift z ≃ 9. each was selected on account of a prominent excess seen in the spitzer/irac 4.5 $\mu$m band which, for a redshift above z = 9.0, likely indicates the presence of a r... | probing cosmic dawn: ages and star formation histories of candidate z ≥ 9 galaxies |
the early release observations (eros) of jwst beautifully demonstrate the promise of jwst in characterizing the universe at cosmic dawn. we analyze the near infrared spectrograph ero spectra of three z ~ 8 galaxies to determine their metallicities, gas temperatures, and ionization. these galaxies offer the first opport... | finding peas in the early universe with jwst |
macs0647-jd is a triply lensed z ~ 11 galaxy originally discovered with the hubble space telescope. the three lensed images are magnified by factors of ~8, 5, and 2 to ab mag 25.1, 25.6, and 26.6 at 3.5 μm. the brightest is over a magnitude brighter than other galaxies recently discovered at similar redshifts z > 10... | jwst reveals a possible z 11 galaxy merger in triply lensed macs0647-jd |
we present a high-resolution analysis of the host galaxy of fast radio burst (frb) 190608, an sb(r)c galaxy at z = 0.11778 (hereafter hg 190608), to dissect its local environment and its contributions to the frb properties. our hubble space telescope wide field camera 3 ultraviolet and visible light image reveals that ... | dissecting the local environment of frb 190608 in the spiral arm of its host galaxy |
we present the rationale for and the observational description of aspecs: the alma spectroscopic survey in the hubble ultra-deep field (udf), the cosmological deep field that has the deepest multi-wavelength data available. our overarching goal is to obtain an unbiased census of molecular gas and dust continuum emissio... | alma spectroscopic survey in the hubble ultra deep field: survey description |
we present real-time automated photometric identification (rapid), a novel time series classification tool capable of automatically identifying transients from within a day of the initial alert, to the full lifetime of a light curve. using a deep recurrent neural network with gated recurrent units (grus), we present th... | rapid: early classification of explosive transients using deep learning |
(abridged) the maunakea spectroscopic explorer (mse) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. it will unveil the composition and dynamics of the faint universe and impact nearly every field of astrophysics across all spatial scales, from individua... | the detailed science case for the maunakea spectroscopic explorer, 2019 edition |
giant molecular clouds (gmcs) are the sites of star formation and stellar feedback in galaxies. their properties set the initial conditions for star formation and their lifecycles determine how feedback regulates galaxy evolution. in recent years, the advent of high-resolution telescopes has enabled systematic gmc-scal... | the life and times of giant molecular clouds |
the athena x-ray integral unit (x-ifu) is the high resolution x-ray spectrometer studied since 2015 for flying in the mid-30s on the athena space x-ray observatory. athena is a versatile observatory designed to address the hot and energetic universe science theme, as selected in november 2013 by the survey science comm... | the athena x-ray integral field unit: a consolidated design for the system requirement review of the preliminary definition phase |
context. the star cluster r136 inside the large magellanic cloud hosts a rich population of massive stars, including the most massive stars known. the strong stellar winds of these very luminous stars impact their evolution and the surrounding environment. we currently lack detailed knowledge of the wind structure that... | the r136 star cluster dissected with hubble space telescope/stis. iii. the most massive stars and their clumped winds |
the distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled. we have determined the gas phase oxygen abundances for 7138 h ii regions across the disks of eight nearby galaxies using very large telescope/... | mapping metallicity variations across nearby galaxy disks |
observations of reionization-era analogues at z ~ 3 are a powerful tool for constraining reionization. rest-ultraviolet observations are particularly useful, in which both direct and indirect tracers of ionizing-photon production and escape can be observed. we analyse a sample of 124 z ~ 3 galaxies from the keck lyman ... | an uncontaminated measurement of the escaping lyman continuum at z 3 |
aims: we have recently reported the discovery of five low redshift lyman continuum (lyc) emitters (lces) with absolute escape fractions fesclyc that range from 6 to 13%, higher than previously found and that more than double the number of low redshift lces. we use these observations to test theoretical predictions abou... | lyman-α spectral properties of five newly discovered lyman continuum emitters |
we present the temperature and polarization angular power spectra measured by the atacama cosmology telescope polarimeter (actpol). we analyze night-time data collected during 2013-14 using two detector arrays at 149 ghz, from 548 deg2 of sky on the celestial equator. we use these spectra, and the spectra measured with... | the atacama cosmology telescope: two-season actpol spectra and parameters |
the six parameters of the standard λcdm model have best-fit values derived from the planck temperature power spectrum that are shifted somewhat from the best-fit values derived from wmap data. these shifts are driven by features in the planck temperature power spectrum at angular scales that had never before been measu... | planck intermediate results. li. features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters |
the mimes (magnetism in massive stars) project is a large-scale, high-resolution, sensitive spectropolarimetric investigation of the magnetic properties of o- and early b-type stars. initiated in 2008 and completed in 2013, the project was supported by three large program allocations, as well as various programmes init... | the mimes survey of magnetism in massive stars: introduction and overview |
we report the detection of a single burst from the first-discovered repeating fast radio burst (frb) source, frb 121102, with the canadian hydrogen intensity mapping experiment (chime) telescope, which operates in the frequency band 400-800 mhz. the detected burst occurred on 2018 november 19 and its emission extends d... | chime/frb detection of the original repeating fast radio burst source frb 121102 |
galaxy mergers are expected to have a significant role in the mass assembly of galaxies in the early universe, but there are very few observational constraints on the merger history of galaxies at z > 2. we present the first study of galaxy major mergers (mass ratios <1:4) in mass-selected samples out to z ≈ 6. u... | observational constraints on the merger history of galaxies since z ≈ 6: probabilistic galaxy pair counts in the candels fields |
gn-z11 was photometrically selected as a luminous star-forming galaxy candidate at redshift z > 10 on the basis of hubble space telescope imaging data1. follow-up hubble space telescope near-infrared grism observations detected a continuum break that was explained as the lyα break corresponding to z =11.0 9−0.12+0.0... | evidence for gn-z11 as a luminous galaxy at redshift 10.957 |
we present the clump populations detected in 18 lensed galaxies at redshifts 1--8.5 within the lensing cluster field smacs0723. the recent jwst early release observations of this poorly known region of the sky have revealed numerous point-like sources within and surrounding their host galaxies, undetected in the shallo... | star formation at the smallest scales: a jwst study of the clump populations in smacs0723 |
exploiting the fundamentally achromatic nature of gravitational lensing, we present a lens model for the massive galaxy cluster smacs j0723.3-7323 (smacs j0723; z = 0.388) that significantly improves upon earlier work. building on strong-lensing constraints identified in prior hubble space telescope (hst) observations,... | precision modeling of jwst's first cluster lens smacs j0723.3-7327 |
we present the third and final data release of the large early galaxy astrophysics census (lega-c), an eso/very large telescope public spectroscopic survey targeting 0.6 < z < 1.0, ks-selected galaxies. the data release contains 3528 spectra with measured stellar velocity dispersions and stellar population proper... | the large early galaxy astrophysics census (lega-c) data release 3: 3000 high-quality spectra of ks-selected galaxies at z > 0.6 |
the atacama cosmology telescope (act) makes high angular resolution measurements of anisotropies in the cosmic microwave background (cmb) at millimeter wavelengths. we describe actpol, an upgraded receiver for act, which uses feedhorn-coupled, polarization-sensitive detector arrays, a 3° field of view, 100 mk cryogenic... | the atacama cosmology telescope: the polarization-sensitive actpol instrument |
we present a mass-luminosity relation (mlr) for red dwarfs spanning a range of masses from 0.62 {{ m }}⊙to the end of the stellar main sequence at 0.08 {{ m }}⊙ . the relation is based on 47 stars for which dynamical masses have been determined, primarily using astrometric data from fine guidance sensors (fgs) 3 and 1r... | the solar neighborhood. xxxvii: the mass-luminosity relation for main-sequence m dwarfs |
we present the discovery of three new milky way satellites from our search for compact stellar overdensities in the photometric catalog of the panoramic survey telescope and rapid response system 1 (pan-starrs 1, or ps1) 3π survey. the first satellite, laevens 3, is located at a heliocentric distance of d = 67 ± 3 kpc.... | sagittarius ii, draco ii and laevens 3: three new milky way satellites discovered in the pan-starrs 1 3π survey |
context. outflows accelerated by active galactic nuclei (agn) are commonly observed in the form of coherent, mildly collimated high-velocity gas directed along the agn ionisation cones and kinetically powerful (≳1044 − 45 erg s−1) jets. recent works found that outflows can also be accelerated by low-power (≲1044 erg s−... | magnum survey: compact jets causing large turmoil in galaxies. enhanced line widths perpendicular to radio jets as tracers of jet-ism interaction |
correlations between the mass of a supermassive black hole (smbh) and the properties of its host galaxy (e.g., total stellar mass m *, luminosity l host) suggest an evolutionary connection. a powerful test of a coevolution scenario is to measure the relations {{ \mathcal m }}bh}-l host and {{ \mathcal m }}bh}-m * at hi... | the mass relations between supermassive black holes and their host galaxies at 1 < z < 2 hst-wfc3 |
context. the second data release (dr2) from the european space agency mission gaia took place on april 2018. dr2 included photometry for more than 1.3 × 109 sources in the three bands g, gbp, and grp. even though the gaia dr2 photometry is very precise, there are currently three alternative definitions of the sensitivi... | reanalysis of the gaia data release 2 photometric sensitivity curves using hst/stis spectrophotometry |
we announce the discovery of the crater 2 dwarf galaxy, identified in imaging data of the vlt survey telescope atlas survey. given its half-light radius of ∼1100 pc, crater 2 is the fourth largest satellite of the milky way, surpassed only by the large magellanic cloud, small magellanic cloud and the sgr dwarf. with a ... | the feeble giant. discovery of a large and diffuse milky way dwarf galaxy in the constellation of crater |
we report the discovery of 10 kpc [c ii] 158 μm halos surrounding star-forming galaxies in the early universe. we choose deep atacama large millimeter/submillimeter array data for 18 galaxies, each with a star formation rate of ≃10-70 m ⊙ with no signature of an active galactic nucleus whose [c ii] lines are individual... | first identification of 10 kpc [c ii] 158 μm halos around star-forming galaxies at z = 5-7 |
we report the first apogee metallicities and α-element abundances measured for 3600 red giant stars spanning a large radial range of both the large (lmc) and small magellanic clouds, the largest milky way (mw) dwarf galaxies. our sample is an order of magnitude larger than that of previous studies and extends to much l... | the lazy giants: apogee abundances reveal low star formation efficiencies in the magellanic clouds |
lofar, the low-frequency array, is a powerful new radio telescope operating between 10 and 240 mhz. lofar allows detailed sensitive high-resolution studies of the low-frequency radio sky. at the same time lofar also provides excellent short baseline coverage to map diffuse extended emission. however, producing high-qua... | lofar facet calibration |
the evolution of galaxies throughout the last 12 gyr of cosmic time has followed a single, universal relation that connects star-formation rates (sfrs), stellar masses (m⋆) and chemical abundances. deviation from this fundamental scaling relation would imply a drastic change in the processes that regulate galaxy evolut... | dilution of chemical enrichment in galaxies 600 myr after the big bang |
in 2017, the event horizon telescope (eht) collaboration succeeded in capturing the first direct image of the center of the m87 galaxy. the asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109m⊙. the ehtc also partnered with s... | broadband multi-wavelength properties of m87 during the 2017 event horizon telescope campaign |
we present a catalog of 10,718 objects in the cosmos field, observed through multi-slit spectroscopy with the deep imaging multi-object spectrograph (deimos) on the keck ii telescope in the wavelength range ∼5500-9800 å. the catalog contains 6617 objects with high-quality spectra (two or more spectral features), and 17... | the deimos 10k spectroscopic survey catalog of the cosmos field |
nitrogen is a critical ingredient of complex biological molecules. molecular nitrogen, however, which was outgassed into the earth’s early atmosphere, is relatively chemically inert and nitrogen fixation into more chemically reactive compounds requires high temperatures. possible mechanisms of nitrogen fixation include... | prebiotic chemistry and atmospheric warming of early earth by an active young sun |
context. new generation low-frequency telescopes are exploring a new parameter space in terms of depth and resolution. the data taken with these interferometers, for example with the low frequency array (lofar), are often calibrated in a low signal-to-noise ratio regime and the removal of critical systematic effects is... | systematic effects in lofar data: a unified calibration strategy |
we present the first search for z ≥ 7, continuum-confirmed lyman break sources with niriss/wfs spectroscopy over the abell 2744 frontier fields cluster, as part of the glass-jwst-ers survey. with ~15 hr of preimaging and multiangle grism exposures in the f115w, f150w, and f200w filters, we describe the general data han... | early results from glass-jwst. i: confirmation of lensed z ≥ 7 lyman-break galaxies behind the abell 2744 cluster with niriss |
current time domain facilities are finding several hundreds of transient astronomical events a year. the discovery rate is expected to increase in the future as soon as new surveys such as the zwicky transient facility (ztf) and the large synoptic sky survey (lsst) come online. presently, the rate at which transients a... | the sed machine: a robotic spectrograph for fast transient classification |
the fourstar galaxy evolution survey (zfourge) is a 45 night legacy program with the fourstar near-infrared camera on magellan and one of the most sensitive surveys to date. zfourge covers a total of 400 arcmin2 in cosmic fields cdfs, cosmos and uds, overlapping candels. we present photometric catalogs comprising >7... | the fourstar galaxy evolution survey (zfourge): ultraviolet to far-infrared catalogs, medium-bandwidth photometric redshifts with improved accuracy, stellar masses, and confirmation of quiescent galaxies to z ∼ 3.5 |
we present near-infrared interferometric data on the seyfert 2 galaxy ngc 1068, obtained with the gravity instrument on the european southern observatory very large telescope interferometer. the extensive baseline coverage from 5 to 60 mλ allowed us to reconstruct a continuum image of the nucleus with an unrivaled 0.2 ... | an image of the dust sublimation region in the nucleus of ngc 1068 |
interferometric imaging now achieves angular resolutions as fine as ∼10 μas, probing scales that are inaccessible to single telescopes. traditional synthesis imaging methods require calibrated visibilities; however, interferometric calibration is challenging, especially at high frequencies. nevertheless, most studies p... | interferometric imaging directly with closure phases and closure amplitudes |
the ultra-violet imaging telescope (uvit) is one of the payloads in astrosat, the first indian space observatory. the uvit instrument has two 375 mm telescopes: one for the far-ultraviolet (fuv) channel (1300-1800 å), and the other for the near-ultraviolet (nuv) channel (2000-3000 å) and the visible (vis) channel (3200... | in-orbit calibrations of the ultraviolet imaging telescope |
galactic outflows are known to consist of several gas phases; however, the connection between these phases has been investigated little and only in a few objects. in this paper, we analyse multi unit spectroscopic explorer (muse)/very large telescope (vlt) data of 26 local (u)lirgs and study their ionized and neutral a... | properties of the multiphase outflows in local (ultra)luminous infrared galaxies |
we present hubble space telescope ultraviolet and infrared observations of eight fast radio burst (frb) host galaxies with subarcsecond localizations, including the hosts of three known repeating frbs. we quantify their spatial distributions and locations with respect to their host galaxy light distributions, finding t... | a high-resolution view of fast radio burst host environments |
the large-aperture experiment to detect the dark age (leda) was designed to detect the predicted o(100) mk sky-averaged absorption of the cosmic microwave background by hydrogen in the neutral pre- and intergalactic medium just after the cosmological dark age. the spectral signature would be associated with emergence o... | design and characterization of the large-aperture experiment to detect the dark age (leda) radiometer systems |
the solar atmosphere is full of complicated transients manifesting the reconfiguration of the solar magnetic field and plasma. solar jets represent collimated, beam-like plasma ejections; they are ubiquitous in the solar atmosphere and important for our understanding of solar activities at different scales, the magneti... | observation and modelling of solar jets |
the south pole telescope has discovered 100 gravitationally lensed, high-redshift, dusty, star-forming galaxies (dsfgs). we present 0.″5 resolution 870 μ {{m}} atacama large millimeter/submillimeter array imaging of a sample of 47 dsfgs spanning z=1.9{--}5.7, and construct gravitational lens models of these sources. ou... | alma imaging and gravitational lens models of south pole telescope—selected dusty, star-forming galaxies at high redshifts |
context. gamma doradus stars (hereafter γ dor stars) are known to exhibit gravity- and/or gravito-intertial modes that probe the inner stellar region near the convective core boundary. the non-equidistant spacing of the pulsation periods is an observational signature of the stellar evolutions and current internal struc... | interior rotation of a sample of γ doradus stars from ensemble modelling of their gravity-mode period spacings |
cosmological simulations serve as invaluable tools for understanding the universe. however, the technical complexity and substantial computational resources required to generate such simulations often limit their accessibility within the broader research community. notable exceptions exist, but most are not suited for ... | the thesan project: public data release of radiation-hydrodynamic simulations matching reionization-era jwst observations |
we present a new method for performing differential emission measure (dem) inversions on narrow-band euv images from the atmospheric imaging assembly (aia) on board the solar dynamics observatory. the method yields positive definite dem solutions by solving a linear program. this method has been validated against a div... | thermal diagnostics with the atmospheric imaging assembly on board the solar dynamics observatory: a validated method for differential emission measure inversions |
fast radio bursts (frbs) are bright millisecond radio bursts at cosmological distances. only three frbs have exhibited extreme activities, such as achieving a peak event rate $\gtrsim 100$ hr$^{-1}$ or being persistently active. only these three among $\sim 50$ known repeating frbs have circular polarization. we observ... | an extreme active repeating fast radio burst in a clean environment |
we present the first rest-frame optical size-luminosity relation of galaxies at z > 7, using the nircam imaging data obtained by the glass james webb space telescope early release science (glass-jwst-ers) program, providing the deepest extragalactic data of the ers campaign. our sample consists of 19 photometrically... | early results from glass-jwst. v: the first rest-frame optical size-luminosity relation of galaxies at z > 7 |
this paper highlights initial photometric analyses of jwst nircam imaging data in the sightline of smacs0723, aiming to identify galaxies at redshift z > 7. by applying a conservative lyman-break selection followed by photometric-redshift analysis and visual inspection, we identify four f090w-dropout and two f150w-d... | physical characterization of early galaxies in the webb's first deep field smacs j0723.3-7323 |
as the james webb space telescope (jwst) has become fully operational, early release data are now available to begin building the tools and calibrations for precision point-source photometry and astrometry in crowded cluster environments. here, we present our independent reduction of nircam imaging of the metal-poor gl... | photometry and astrometry with jwst - i. nircam point spread functions and the first jwst colour-magnitude diagrams of a globular cluster |
spt-3g is the third survey receiver operating on the south pole telescope dedicated to high-resolution observations of the cosmic microwave background (cmb). sensitive measurements of the temperature and polarization anisotropies of the cmb provide a powerful data set for constraining cosmology. additionally, cmb surve... | the design and integrated performance of spt-3g |
we study the accretion of collisionless plasma onto a rotating black hole from first principles using axisymmetric general-relativistic particle-in-cell simulations. we carry out a side-by-side comparison of these results to analogous general-relativistic magnetohydrodynamic simulations. although there are many similar... | collisionless accretion onto black holes: dynamics and flares |
galaxy sizes and their evolution over cosmic time have been studied for decades and serve as key tests of galaxy formation models. however, at z ≳ 1 these studies have been limited by a lack of deep, high-resolution rest-frame infrared imaging that accurately traces stellar mass distributions. here, we leverage the new... | rest-frame near-infrared sizes of galaxies at cosmic noon: objects in jwst's mirror are smaller than they appeared |
the automated design of imaging systems involving no or minimal human effort has always been the expectation of scientists, researchers and optical engineers. in addition, it is challenging to choose an appropriate starting point for an optical system design. in this paper, we present a novel design framework based on ... | automated design of freeform imaging systems |
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