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The mean free path of ionizing photons at 5 < z < 6: evidence for rapid
evolution near reionization: The mean free path of ionizing photons, $\lambda_{\rm mfp}$, is a key factor
in the photoionization of the intergalactic medium (IGM). At $z \gtrsim 5$,
however, $\lambda_{\rm mfp}$ may be short enough that measuremen... | astro-ph |
On the origin of cosmic web: The emergence of one and two-dimensional configurations -- Zeldovich pancakes
-- progenitors of the observed filaments and clusters and groups of galaxies,
is predicted by means of a developed kinetic approach in analyzing the
evolution of initial density perturbations. The self-consistent ... | astro-ph |
Mid-infrared spectra of T Tauri disks: Modeling the effects of a small
inner cavity on CO2 and H2O emission: [Abridged] The inner few AU of disks around young stars are best probed in
the infrared. The James Webb Space Telescope (JWST) is now starting to
characterize the chemistry of these regions in unprecedented de... | astro-ph |
PAH and nbL Features Detection in Planetary Nebulae NGC 7027 and BD
+303639 with TIRCAM2 Instrument on 3.6m DOT: High resolution infrared imaging observations of the young Planetary Nebulae
NGC 7027 and BD +303639, taken with the newly installed TIFR Infrared Camera-II
(TIRCAM2) on 3.6m Devasthal Optical Telescope (D... | astro-ph |
Synthetic Spectra of Hydrodynamic Models of Type Ia Supernovae: We present detailed NLTE synthetic spectra of hydrodynamic SNe Ia models. We
make no assumptions about the form of the spectrum at the inner boundary. We
calculate both Chandrasekhar-mass deflagration models and sub-Chandrasekhar
``helium detonators.'' Gam... | astro-ph |
An External Shock Origin of GRB $\textit{141028A}$: The prompt emission of the long, smooth, and single-pulsed gamma-ray burst,
GRB $\textit{141028A}$, is analyzed under the guise of an external shock model.
First, we fit the $\gamma$-ray spectrum with a two-component photon model,
namely synchrotron+blackbody, and the... | astro-ph |
Investigation of systematic effects in Kepler data: Seasonal variations
in the light curve of HAT-P-7b: With years of Kepler data currently available, it can now be attempted to
measure variations in planetary transit depths over time. To do so, it is of
primary importance to understand which systematic effects may a... | astro-ph |
The F-CHROMA grid of 1D RADYN flare models: Context: Solar flares are the result of the sudden release of magnetic energy
in the corona. Much of this energy goes into accelerating charged particles to
high velocity. These particles travel along the magnetic field and the energy
is dissipated when the density gets high ... | astro-ph |
Demystifying an unidentified EGRET source by VHE gamma-ray observations: In a novel approach in observational high-energy gamma-ray astronomy,
observations carried out by imaging atmospheric Cherenkov telescopes provide
necessary templates to pinpoint the nature of intriguing, yet unidentified
EGRET gamma-ray sources. ... | astro-ph |
Optical Outburst of the Gamma-Ray Blazar S4 0954+658 in March-April 2011: We present optical photopolarimetric observations of the BL Lac object S4
0954+658 obtained with the 70-cm telescope in Crimea, 40-cm telescope in
St.Petersburg, and 1.8-m Perkins telescope at Lowell Observatory (Flagstaff,
Az). After a faint sta... | astro-ph |
ExoMol line lists XXVIII: The rovibronic spectrum of AlH: A new line list for AlH is produced. The WYLLoT line list spans two
electronic states $X\,{}^1\Sigma^+$ and $A\,{}^1\Pi$. A diabatic model is used
to model the shallow potential energy curve of the $A\,{}^1\Pi$ state, which
has a strong pre-dissociative characte... | astro-ph |
Bright X-ray bursts from 1E 1724-3045 in Terzan 2: During about 3 years wide field monitoring of the Galactic Center region by
the WFC telescopes on board the BeppoSAX satellite, a total of 14 type-I X-ray
bursts were detected from the burster 1E 1724-3045 located in the globular
cluster Terzan 2. All the observed even... | astro-ph |
Statistical properties of local and intermediate z galaxies: Galaxy evolution during the last 9 Gyr is discussed. It can be traced back
from well known present-day galaxies or directly observed for galaxies at
different look back times. This requires clear and consistently matched
selection criteria for galaxy samples.... | astro-ph |
Asteroid Evolution: Role of Geotechnical Properties: This paper presents a brief review and latest results of the work that has
been carried out by the Planetary Science community in order to understand that
role of the geotechnical properties of granular asteroids (commonly known as
"rubble-pile" asteroids) in their f... | astro-ph |
Can Gaia find planets around white dwarfs?: The Gaia spacecraft presents an unprecedented opportunity to reveal the
population of long period (a>1\,au) exoplanets orbiting stars across the H-R
diagram, including white dwarfs. White dwarf planetary systems have played an
important role in the study of planetary composit... | astro-ph |
Evidence for ammonia-bearing species on the Uranian satellite Ariel
supports recent geologic activity: We investigated whether ammonia-rich constituents are present on the surface
of the Uranian moon Ariel by analyzing 32 near-infrared reflectance spectra
collected over a wide range of sub-observer longitudes and lat... | astro-ph |
The Properties of Fossil Groups of Galaxies: Numerical simulations as well as optical and X-ray observations over the last
few years have shown that poor groups of galaxies can evolve to what is called
a fossil group. Dynamical friction as the driving process leads to the
coalescence of individual galaxies in ordinary ... | astro-ph |
A missing outskirts problem? Comparisons between stellar halos in the
Dragonfly Nearby Galaxies Survey and the TNG100 simulation: Low surface brightness galactic stellar halos provide a challenging but
promising path towards unraveling the past assembly histories of individual
galaxies. Here, we present detailed comp... | astro-ph |
A Propos Crossing the Hertzsprung Gap: The evolution of intermediate-mass and massive stars speeds up considerably
after they finish their hydrogen core-burning. Due to this accelerated
evolution, the probability to observe stars during this episode is small. In
suitable stellar aggregates, in particular star clusters ... | astro-ph |
First stars in Damped Lyman Alpha systems: In order to characterize Damped Lyman Alpha systems (DLAs) potentially
hosting first stars, we present a novel approach to investigate DLAs in the
context of Milky Way (MW) formation, along with their connection with the most
metal-poor stars and local dwarf spheroidal (dSph) ... | astro-ph |
The DESI One-Percent Survey: Evidence for Assembly Bias from
Low-Redshift Counts-in-Cylinders Measurements: We explore the galaxy-halo connection information that is available in
low-redshift samples from the early data release of the Dark Energy
Spectroscopic Instrument (DESI). We model the halo occupation distribut... | astro-ph |
Statistics in astronomy: Perhaps more than other physical sciences, astronomy is frequently
statistical in nature. The objects under study are inaccessible to direct
manipulation in the laboratory, so the astronomer is restricted to observing a
few external characteristics and inferring underlying properties and physic... | astro-ph |
The Initial Mass Functions in the Super-Star-Clusters NGC 1569A and NGC
1705-1: I use recent photometric and stellar velocity dispersion measurements of the
super-star-clusters (SSCs) NGC 1569A and NGC 1705-1 to determine their
present-day luminosity/mass (L_V/M) ratios. I then use the inferred L_V/M
ratios, together... | astro-ph |
The detection of diffuse emission in HCG 16 with XMM-Newton: We report results obtained from analysis of the XMM-Newton observation of the
compact group of galaxies HCG 16. It is a peculiar system composed of 7
spirals,
6 of which are active, and its nature as a bound system has been much
debated. The EPIC camera obs... | astro-ph |
Long-term spectropolarimetric monitoring of the cool supergiant
Betelgeuse: We report on a long-term monitoring of the cool supergiant Betelgeuse, using
the NARVAL and ESPaDOnS high-resolution spectropolarimeters, respectively
installed at Telescope Bernard Lyot (Pic du Midi Observatory, France) and at
the Canada-Fra... | astro-ph |
The Stellar Kinematics of Extragalactic Bulges: Galactic bulges are complex systems. Once thought to be small-scale versions
of elliptical galaxies, advances in astronomical instrumentation (spectroscopy
in particular) has revealed a wealth of photometric and kinematic substructure
in otherwise simple-looking component... | astro-ph |
Jet quenching in the neutron star low-mass X-ray binary 1RXS
J180408.9$-$342058: We present quasi-simultaneous radio (VLA) and X-ray ($Swift$) observations of
the neutron star low-mass X-ray binary (NS-LMXB) 1RXS J180408.9$-$342058
(J1804) during its 2015 outburst. We found that the radio jet of J1804 was
bright ($23... | astro-ph |
[O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars: We present high spectral-resolution optical spectra of 49 Herbig Ae/Be stars
in a search for the [O I] 6300.2 A line. The vast majority of the stars in our
sample show narrow (FWHM < 100 km/s) emission lines, centered on the stellar
radial velocity. Some stars... | astro-ph |
Cosmic Web & Caustic Skeleton: non-linear Constrained Realizations -- 2D
case studies: The cosmic web consists of a complex configuration of voids, walls,
filaments, and clusters, which formed under the gravitational collapse of
Gaussian fluctuations. Understanding under what conditions these different
structures eme... | astro-ph |
Mitigating Modal Noise in Multimode Circular Fibres by Optical Agitation
using a Galvanometer: Modal noise appears due to the non-uniform and unstable distribution of light
intensity among the finite number of modes in multimode fibres. It is an
important limiting factor in measuring radial velocity precisely by fibr... | astro-ph |
Foraging with MUSHROOMS: A Mixed-Integer Linear Programming Scheduler
for Multimessenger Target of Opportunity Searches with the Zwicky Transient
Facility: Electromagnetic follow-up of gravitational wave detections is very resource
intensive, taking up hours of limited observation time on dozens of telescopes.
Crea... | astro-ph |
Universal lateral distribution of energy deposit in air showers and its
application to shower reconstruction: The light intensity distribution in a shower image and its implications to
the primary energy reconstructed by the fluorescence technique are studied.
Based on detailed CORSIKA energy deposit simulations, a u... | astro-ph |
The X-ray Luminosity Function of Nearby Rich and Poor Clusters of
Galaxies: A Cosmological Probe: In this letter, we present a new determination of the local (z<0.09) X-ray
luminosity function (XLF) using a large, statistical sample of 294 Abell
clusters and the ROSAT All-Sky-Survey. Given our large sample size, we h... | astro-ph |
Evidence for a Galactic Origin of Very Short Gamma Ray Bursts and
Primordial Black Hole Sources: We systematically study the shortest time duration gamma ray bursts and find
unique features that are best interpreted as sources of a galactic origin.
There is a significant angular asymmetry and the V/Vmax distribution ... | astro-ph |
Synchrotron X-ray diagnostics of cutoff shape of nonthermal electron
spectrum at young supernova remnants: Synchrotron X-rays can be a useful tool to investigate electron acceleration
at young supernova remnants (SNRs). At present, since the magnetic field
configuration around the shocks of SNRs is uncertain, it is n... | astro-ph |
Spectral Analysis Code: PARAS SPEC: The light emitted from the stellar photosphere serves as a unique signature
for the nature of stars. The behaviour of these stellar lines depend upon the
surface temperature, mass, evolutionary status and chemical composition of the
star. With the advent of high-resolution spectrogra... | astro-ph |
The physics of Lyman-alpha escape from disc-like galaxies: Hydrogen emission lines can provide extensive information about star-forming
galaxies in both the local and high-redshift Universe. We present a detailed
Lyman continuum (LyC), Lyman-alpha (Ly{\alpha}), and Balmer line (H{\alpha} and
H\b{eta}) radiative transfe... | astro-ph |
Effects of the South Atlantic Anomaly on the muon flux at sea level: The goal of this study is to examine the response and changes of the muon
intensity at ground, due to magnetic anomaly over south Atlantic. Based on the
data of two directional muon telescopes and located at 22S and 43W. These
coordinates are inside o... | astro-ph |
The Star Formation Rates of Elliptical Galaxies from Core-Collapse
Supernovae: The level of star formation in elliptical galaxies is poorly constrained, due
to difficulties in quantifying the contamination of flux-based estimates of
star formation from unrelated phenomena, such as AGN and old stellar
populations. We ... | astro-ph |
Chlorine Abundances in Cool Stars: Chlorine abundances are reported in 15 evolved giants and one M dwarf in the
solar neighborhood. The Cl abundance was measured using the vibration-rotation
1-0 P8 line of H$^{35}$Cl at 3.69851 $\mu$m. The high resolution L-band spectra
were observed using the Phoenix infrared spectrom... | astro-ph |
A dynamical study on the habitability of terrestrial exoplanets I:
Tidally evolved planet-satellite pairs: We investigate the obliquity and spin period of Earth-Moon like systems after
4.5 Gyr of tidal evolution with various satellite masses and initial planetary
obliquity and discuss their relations to the habitabil... | astro-ph |
The Cosmological Evolution of Self-interacting Dark Matter: We study the evolution of cosmological perturbations in dark-matter models
with elastic and velocity-independent self interactions. Such interactions are
imprinted in the matter-power spectrum as dark acoustic oscillations, which can
be experimentally explored... | astro-ph |
Multiwavelength study of Cygnus A III. Evidence for relic lobe plasma: We study the particle energy distribution in the cocoon surrounding Cygnus A,
using radio images between 151 MHz and 15 GHz and a 200 ks Chandra ACIS-I
image. We show that the excess low frequency emission in the the lobe further
from Earth cannot b... | astro-ph |
The temperature structure in the core of Sersic 159-03: We present results from a new 120 ks XMM-Newton observation of the cluster of
galaxies Sersic 159-03. In this paper we focus on the high-resolution X-ray
spectra obtained with the Reflection Grating Spectrometer (RGS). The spectra
allow us to constrain the tempera... | astro-ph |
Squeezing $f_{\rm NL}$ out of the matter bispectrum with consistency
relations: We show how consistency relations can be used to robustly extract the
amplitude of local primordial non-Gaussianity ($f_{\rm NL}$) from the squeezed
limit of the matter bispectrum, well into the non-linear regime. First, we
derive a non-p... | astro-ph |
Hubble Ultraviolet Spectroscopy of Jupiter Trojans: We present the first ultraviolet spectra of Jupiter Trojans. These
observations were carried out using the Space Telescope Imaging Spectrograph on
the Hubble Space Telescope and cover the wavelength range 200-550 nm at low
resolution. The targets include objects from ... | astro-ph |
Supernova Remnants as a Probe of Dust Grains in the Interstellar Medium: Interstellar dust grains play a crucial role in the evolution of the galactic
interstellar medium (ISM). Despite its importance, however, dust remains poorly
understood in terms of its origin, composition, and abundance throughout the
universe. Su... | astro-ph |
Bringing 2D Eclipse Mapping out of the Shadows with Leave-one-out
Cross-validation: Eclipse mapping is a technique for inferring 2D brightness maps of transiting
exoplanets from the shape of an eclipse light curve. With JWST's unmatched
precision, eclipse mapping is now possible for a large number of exoplanets.
Howe... | astro-ph |
Multi-D Simulations of Ultra-Stripped Supernovae to Shock Breakout: The recent discoveries of many double neutron star systems and their
detection as LIGO-Virgo merger events call for a detailed understanding of
their origin. Explosions of ultra-stripped stars in binary systems have been
shown to play a key role in thi... | astro-ph |
An Ultraviolet Spectrum of the Tidal Disruption Flare ASASSN-14li: We present a Hubble Space Telescope STIS spectrum of ASASSN-14li, the first
rest-frame UV spectrum of a tidal disruption flare (TDF). The underlying
continuum is well fit by a blackbody with $T_{\mathrm{UV}} = 3.5 \times 10^{4}$
K, an order of magnitude... | astro-ph |
Detection and Characterization of Exoplanets and Disks using Projections
on Karhunen-Loeve Eigenimages: We describe a new method to achieve point spread function (PSF) subtractions
for high- contrast imaging using Principal Component Analysis (PCA) that is
applicable to both point sources or extended objects (disks).... | astro-ph |
Rotational broadening and conservation of angular momentum in
post-extreme horizontal branch stars: We show that the recent realization that isolated post-extreme horizontal
branch (post-EHB) stars are generally characterized by rotational broadening
with values of $V_{\rm rot} \sin i$ between 25 and 30 km~s$^{-1}$ c... | astro-ph |
Laboratory experiments and simulations on jets: Astrophysical jets have been studied with observations, theoretical models
and numerical simulations for decades. Recently, supersonic magnetized jets
have been formed in laboratory experiments of high-energy density plasmas. I
will review these studies and discuss the ex... | astro-ph |
Time-Delayed transfer functions simulations for LMXBs: Recent works (Steeghs & Casares 2002, Casares et al. 2003, Hynes et al. 2003)
have demonstrated that Bowen flourescence is a very efficient tracer of the
companion star in LMXBs. We present a numerical code to simulate time-delayed
transfer functions in LMXBs, spec... | astro-ph |
A New View of the Super Star Clusters in the Low-Metallicity Galaxy SBS
0335-052: We present a study of the individual super star clusters (SSCs) in the
low-metallicity galaxy SBS 0335-052 using new near-infrared and archival
optical Hubble Space Telescope observations. The physical properties of the
SSCs are derived... | astro-ph |
The role of electron heating physics in images and variability of the
Galactic Centre black hole Sagittarius A*: The accretion flow around the Galactic Center black hole Sagittarius A* (Sgr
A*) is expected to have an electron temperature that is distinct from the ion
temperature, due to weak Coulomb coupling in the l... | astro-ph |
Comparative clustering analysis of Ca II 854.2 nm spectral profiles from
simulations and observations: We aim to compare and contrast the typical shapes of synthetic Ca II 854.2 nm
spectra found in Bifrost simulations having different magnetic activity with
the spectral shapes found in a quiet Sun observation from th... | astro-ph |
Hydrogenation of small aromatic heterocycles at low temperatures: The recent wave of detections of interstellar aromatic molecules has sparked
interest in the chemical behavior of aromatic molecules under astrophysical
conditions. In most cases, these detections have been made through chemically
related molecules, call... | astro-ph |
Parallax Results From URAT Epoch Data: We present 1103 trigonometric parallaxes and proper motions from the United
States Naval Observatory (USNO) Robotic Astrometric Telescope (URAT)
observations taken at the Naval Observatory Flagstaff Station (NOFS) over a 3
year period from April 2012 to June 2015 covering the enti... | astro-ph |
A Quasar Wind Model: A quasar wind model is proposed to describe the spatial and velocity
structure of the broad line region. This model requires detailed
photoionization and magnetohydrodynamic simulation, as the broad line region it
too small for direct spatial resolution. The emission lines are Doppler
broadened, si... | astro-ph |
Relativistic effects in galaxy clustering in a parametrized
post-Friedmann universe: We explore the signatures of quintessence and modified gravity theories in
the relativistic description of galaxy clustering within a parametrized
post-Friedmann framework. For this purpose, we develop a calibration method to
consist... | astro-ph |
Core-collapse explosions of Wolf-Rayet stars and the connection to type
IIb/Ib/Ic supernovae: We present non-LTE time-dependent radiative-transfer simulations of supernova
(SN) IIb/Ib/Ic spectra and light curves, based on ~1B-energy piston-driven
ejecta, with and without 56Ni, produced from single and binary Wolf-Ray... | astro-ph |
Multiple Populations in NGC 1851: Abundance Variations and UV
Photometric Synthesis in the Washington and HST/WFC3 Systems: The analysis of multiple populations (MPs) in globular clusters, both
spectroscopically and photometrically, is key in understanding their formation
and evolution. The relatively narrow Johnson ... | astro-ph |
TOROS Optical follow-up of the Advanced LIGO-VIRGO O2 second
observational campaign: We present the results of the optical follow-up, conducted by the TOROS
collaboration, of gravitational wave events detected during the Advanced
LIGO-Virgo second observing run (Nov 2016 -- Aug 2017). Given the limited field
of view ... | astro-ph |
Short-lived Radio Bursts from the Crab Pulsar: Our high-time-resolution observations reveal that individual main pulses from
the Crab pulsar contain one or more short-lived microbursts. Both the energy
and duration of bursts measured above 1 GHz can vary dramatically in less than
a millisecond. These fluctuations are t... | astro-ph |
The Millennium Galaxy Catalogue: The luminosity functions of bulges and
discs and their implied stellar mass densities: We derive the luminosity functions of elliptical galaxies, galaxy bulges,
galaxy pseudo-bulges and galaxy discs from our structural catalogue of 10,095
galaxies. In addition we compute their associa... | astro-ph |
The effects of drift and winds on the propagation of Galactic cosmic
rays: We study the effects of drift motions and the advection by a Galactic wind on
the propagation of cosmic rays in the Galaxy. We employ a simplified magnetic
field model, based on (and similar to) the Jansson-Farrar model for the
Galactic magnet... | astro-ph |
A vestige low metallicity gas shell surrounding the radio galaxy
0943-242 at z=2.92: Observations are presented showing the doublet CIV 1550 absorption lines
superimposed on the CIV emission in the radio galaxy 0943-242. Within the
errors, the redshift of the absorption system that has a column density of
N_CIV = 10^... | astro-ph |
Isodensity Statistics on Clustering of High-z Objects in Cosmological
Redshift-spaces: We discuss the systematic effects arising from the cosmological
redshift-space (geometric) distortion on the statistical analysis of isodensity
contour using high-redshift catalogs. Especially, we present a simple
theoretical model... | astro-ph |
Evidence for Core Collapse in the Type Ib/c SN 1999ex: We present optical and infrared spectra of SN 1999ex that reveal a clear
example of an intermediate Type Ib/c case. This suggests a continuous
spectroscopic sequence between Type Ib and Type Ic supernovae. We report UBVRIz
photometric observations of SN 1999ex that... | astro-ph |
Abundances of lithium, oxygen, and sodium in the turn-off stars of
Galactic globular cluster 47 Tuc: We aim to determine abundances of Li, O and Na in a sample of of 110 turn-off
(TO) stars, in order to study the evolution of light elements in this cluster
and to put our results in perspective with observations of ot... | astro-ph |
Missing Link Found? --- The ``runaway'' path to supermassive black holes: Observations of stellar kinematics, gas dynamics and masers around galactic
nuclei have now firmly established that many galaxies host central supermassive
black holes (SMBHs) with masses in the range $10^6 \sim 10^9$M$_{\odot}$.
However, how the... | astro-ph |
The search for galactic dark matter clump candidates with Fermi and
MAGIC: We present a systematic search for potential dark matter clumps in our Galaxy
among the 630 unassociated sources included in the LAT 1-year Point Source
Catalog. Assuming a dark matter particle that generates observable gamma-ray
photons beyon... | astro-ph |
Early Solar System $r$-process Abundances Limit Collapsar Origin: Heavy elements produced exclusively through rapid neutron capture (the
'$r$-process') originate from violent cosmic explosions. While neutron star
mergers are the primary candidates, another plausible production site are
'collapsars'---collapsing massive... | astro-ph |
Opening the 21cm EoR Window: Measurements of Foreground Isolation with
PAPER: We present new observations with the Precision Array for Probing the Epoch of
Reionization (PAPER) with the aim of measuring the properties of foreground
emission for 21cm Epoch of Reionization experiments at 150 MHz. We focus on the
footpr... | astro-ph |
Calibration of photometry from the Gemini Multi-Object Spectrograph on
Gemini North: All available observations of photometric standard stars obtained with the
Gemini Multi-Object Spectrograph at Gemini North in the period from August 2001
to December 2003 have been used to establish the calibrations for photometry
o... | astro-ph |
Mid-infrared observations of the nucleus of comet P/2016 BA14
(PANSTARRS): We present mid-infrared observations of comet P/2016 BA14 (PANSTARRS), which
were obtained on UT 2016 March 21.3 at heliocentric and geocentric distances of
1.012 au and 0.026 au, respectively, approximately 30 hours before its closest
approac... | astro-ph |
On the cosmological mass function theory: This paper provides, from one side, a review of the theory of the
cosmological mass function from a theoretical point of view, starting from the
seminal paper of Press & Shechter (1974) to the last developments (Del Popolo &
Gambera (1998, 1999), Sheth & Tormen 1999 (ST), Sheth... | astro-ph |
Perturbations in Tachyon Dark Energy and their Effect on Matter
Clustering: A non-canonical scalar tachyon field is a viable candidate for dark energy
and has been found to be in good agreement with observational data. Background
data alone cannot completely rule out degeneracy between this model and others.
To furth... | astro-ph |
Determination of the Sun's Offset from the Galactic Plane Using Pulsars: We derive the Sun's offset from the local mean Galactic plane($z_\odot$)
using the observed $z$ distribution of young pulsars. Pulsar distances are
obtained from measurements of annual parallax, HI absorption spectra or
associations where availabl... | astro-ph |
Extra galactic sources of high energy neutrinos: The main goal of the construction of large volume, high energy neutrino
telescopes is the detection of extra-Galactic neutrino sources. The existence
of such sources is implied by observations of ultra-high energy, >10^{19} eV,
cosmic-rays (UHECRs), the origin of which i... | astro-ph |
Testing a Galactic Lensing Hypothesis with the Prompt Emission of GRB
221009A: Even at modest amplification, the optical depth to gravitational lensing
through the Galaxy is $<10^{-5}$. However, the large apparent
isotropic-equivalent energy of GRB 221009A coupled with a path through low
Galactic latitude suggests th... | astro-ph |
Potential of radio telescopes as high-frequency gravitational wave
detectors: In the presence of magnetic fields, gravitational waves are converted into
photons and vice versa. We demonstrate that this conversion leads to a
distortion of the cosmic microwave background (CMB), which can serve as a
detector for MHz to ... | astro-ph |
The Evolution of [OII] Emission from Cluster Galaxies: We investigate the evolution of the star formation rate in cluster galaxies.
We complement data from the CNOC1 cluster survey (0.15<z<0.6) with measurements
from galaxy clusters in the 2dF galaxy redshift survey (0.05<z<0.1) and
measurements from recently published... | astro-ph |
A search for rapid optical variability in radio-quiet quasars: The detection of rapid variability on a time-scale of hours in radio-quiet
quasars (RQQSOs) could be a powerful discriminator between starburst, accretion
disc and relativistic jet models of these sources. This paper contains an
account of a dedicated searc... | astro-ph |
H.E.S.S. observations of the supernova remnant RX J0852.0-4622:
shell-type morphology and spectrum of a widely extended VHE gamma-ray source: The shell-type supernova remnant RX J0852.0-4622 was observed with the High
Energy Stereoscopic System (H.E.S.S.) of Atmospheric Cherenkov Telescopes
between December 2004 and ... | astro-ph |
Dwarf Galaxies of Tidal Origin -- Relevant for Cosmology ?: Evolutionary synthesis models for Tidal Dwarf Galaxies (TDGs) are presented
that allow to have varying proportions of young stars formed in the
merger-induced starburst and of stars from the merging spirals' disks. The
specific metallicities as well as the gas... | astro-ph |
Mass Assembly of Stellar Systems and their Evolution with the SMA
(MASSES) -- Full Data Release: We present and release the full dataset for the Mass Assembly of Stellar
Systems and their Evolution with the SMA (MASSES) survey. This survey used the
Submillimeter Array (SMA) to image the 74 known protostars within the... | astro-ph |
Galaxy And Mass Assembly (GAMA): The absence of stellar mass segregation
in galaxy groups and consistent predictions from GALFORM and EAGLE
simulations: We investigate the contentious issue of the presence, or lack thereof, of
satellites mass segregation in galaxy groups using the Galaxy And Mass Assembly
(GAMA) su... | astro-ph |
Structure and Evolution of the Envelopes of Deeply Embedded Massive
Young Stars: The physical structure of the envelopes around a sample of fourteen massive
(1000-100,000 solar L) young stars is investigated on 100- 100,000 AU scales
using maps and spectra in submillimeter continuum and lines of C17O, CS and
H2CO. Th... | astro-ph |
High-Precision Measurements of Brightness Variation of Nereid: Nereid, a satellite of Neptune, has a highly eccentric prograde orbit with a
semi-major axis larger than 200 Neptune radius and is classified as an
irregular satellite. Although the capture origin of irregular satellites has
been widely accepted, several pr... | astro-ph |
Giant Metrewave Radio Telescope limits on cool HI in galaxy groups: We present Giant Metrewave Radio Telescope 21-cm HI observations towards a
sample of compact radio sources behind galaxy groups, to search for cool HI.
The results -- from high dynamic range spectra for 8 lines-of-sight through 7
galaxy groups -- do no... | astro-ph |
Hα and UV luminosities and star formation rates in a large sample
of luminous compact galaxies: We present the results of a statistical study of the star formation rates
(SFR) derived from the Galaxy Evolution Explorer (GALEX) observations in the
ultraviolet continuum and in the H\alpha emission line for a sample of ... | astro-ph |
Recent Developments in Weak Lensing: Measurement of the gravitational distortion of images of distant galaxies is
rapidly becoming established as a powerful probe of the dark mass distribution
in clusters of galaxies. With the advent of large mosaics of CCD's these
methods should provide a composite total mass profile ... | astro-ph |
Dust Reddened Quasars in FIRST and UKIDSS: Beyond the Tip of the Iceberg: We present the results of a pilot survey to find dust-reddened quasars by
matching the FIRST radio catalog to the UKIDSS near-infrared survey, and using
optical data from SDSS to select objects with very red colors. The deep K-band
limit provided... | astro-ph |
Are fulleranes responsible for the 21 micron feature?: Recent detections of C$_{60}$, C$_{70}$, and C$_{60}^+$ in space induced
extensive studies of fullerene derivatives in circumstellar environments. As
the promising fullerene sources, protoplanetary nebulae (PPNe) show a number of
unidentified bands in their infrare... | astro-ph |
Impact of SZ cluster residuals in CMB maps and CMB-LSS
cross-correlations: Residual foreground contamination in cosmic microwave background (CMB) maps,
such as the residual contamination from thermal Sunyaev-Zeldovich (SZ) effect
in the direction of galaxy clusters, can bias the cross-correlation
measurements between... | astro-ph |
Optical Gravitational Lensing Experiment. Distance to the Magellanic
Clouds with the Red Clump Stars: Are the Magellanic Clouds 15% Closer than
Generally Accepted?: We present a new distance determination to the Large and Small Magellanic
Clouds using the newly developed red clump stars method (Paczynski and Stanek... | astro-ph |
Newly Identified Star Clusters in M33. I. Integrated Photometry and
Color-Magnitude Diagrams: We present integrated photometry and color-magnitude diagrams (CMDs) for 24
star clusters in M33, of which 12 were previously uncataloged. These results
are based on Advanced Camera for Surveys observations from the Hubble S... | astro-ph |
SuperAGILE: the hard X-ray Imager for the AGILE space mission: SuperAGILE is a coded mask experiment based on silicon microstrip detectors.
It operates in the 15-45 keV nominal energy range, providing crossed
one-dimensional images of the X-ray sky with an on-axis angular resolution of 6
arcmin, over a field of view in... | astro-ph |
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