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interest in the idea that primordial black holes (pbhs) might comprise some or all of the dark matter has recently been rekindled following ligo's first direct detection of a binary-black-hole merger. here we revisit the effect of accreting pbhs on the cosmic microwave background (cmb) frequency spectrum and the angula... | cosmic microwave background limits on accreting primordial black holes |
cosmological correlation functions contain valuable information about the primordial universe, with possible signatures of new massive particles at very high energies. recent developments, including the cosmological bootstrap, bring new perspectives and powerful tools to study these observables. in this paper, we syste... | boostless cosmological collider bootstrap |
numerical simulations have become one of the key tools used by theorists in all the fields of astrophysics and cosmology. the development of modern tools that target the largest existing computing systems and exploit state-of-the-art numerical methods and algorithms is thus crucial. in this paper, we introduce the full... | swift: a modern highly-parallel gravity and smoothed particle hydrodynamics solver for astrophysical and cosmological applications |
if dark energy, which drives the accelerated expansion of the universe, consists of a light scalar field, it might be detectable as a “fifth force” between normal-matter objects, in potential conflict with precision tests of gravity. chameleon fields and other theories with screening mechanisms, however, can evade thes... | atom-interferometry constraints on dark energy |
vector bosons heavier than 10-22 ev can be viable dark matter candidates with distinctive experimental signatures. ultralight dark matter generally requires a nonthermal origin to achieve the observed density, while still behaving like a pressureless fluid at late times. we show that such a production mechanism natural... | parametric resonance production of ultralight vector dark matter |
the nearby grb221009a at redshift $z=0.1505$ has been observed up to a maximum energy of 18 tev with the lhaaso air shower array. the expected optical depth for a photon with energy $e_\gamma=18$ tev varies between 9.4 and 27.1 according to existing models of the extra-galactic background light (ebl) in the relevant mi... | interpretation of multi-tev photons from grb221009a |
to date, 204 individual molecular species, comprised of 16 different elements, have been detected in the interstellar and circumstellar medium by astronomical observations. these molecules range in size from 2 atoms to 70, and have been detected across the electromagnetic spectrum from centimeter wavelengths to the ult... | 2018 census of interstellar, circumstellar, extragalactic, protoplanetary disk, and exoplanetary molecules |
we analyze the boss power spectrum monopole and quadrupole, and the bispectrum monopole and quadrupole data, using the predictions from the effective field theory of large-scale structure (eftoflss). specifically, we use the one loop prediction for the power spectrum and the bispectrum monopole, and the tree level for ... | the boss bispectrum analysis at one loop from the effective field theory of large-scale structure |
recently, the north american nanohertz observatory for gravitational waves (nanograv) claimed the detection of a stochastic common-spectrum process of the pulsar timing array (pta) time residuals from their 12.5 year data, which might be the first detection of the stochastic background of gravitational waves (gws). we ... | nanograv hints on planet-mass primordial black holes |
the wealth of incoming and future cosmological observations will allow us to map out the structure and evolution of the observable universe to an unprecedented level of precision. among these observations is the weak gravitational lensing of galaxies, e.g., cosmic shear that measures the minute distortions of backgroun... | the intrinsic alignment of galaxies and its impact on weak gravitational lensing in an era of precision cosmology |
we present a new measurement of the hubble constant h0 and other cosmological parameters based on the joint analysis of three multiply imaged quasar systems with measured gravitational time delays. first, we measure the time delay of he 0435-1223 from 13-yr light curves obtained as part of the cosmograil project. compa... | h0licow - v. new cosmograil time delays of he 0435-1223: h0 to 3.8 per cent precision from strong lensing in a flat λcdm model |
we study the large-scale anisotropy of the universe by measuring the dipole in the angular distribution of a flux-limited, all-sky sample of 1.36 million quasars observed by the wide-field infrared survey explorer (wise). this sample is derived from the new catwise2020 catalog, which contains deep photometric measureme... | a test of the cosmological principle with quasars |
we present measurements of the baryon acoustic oscillation (bao) scale in redshift-space using the clustering of quasars. we consider a sample of 147 000 quasars from the extended baryon oscillation spectroscopic survey (eboss) distributed over 2044 square degrees with redshifts 0.8 < z < 2.2 and measure their sp... | the clustering of the sdss-iv extended baryon oscillation spectroscopic survey dr14 quasar sample: first measurement of baryon acoustic oscillations between redshift 0.8 and 2.2 |
hard x-ray (≥10 kev) observations of active galactic nuclei (agns) can shed light on some of the most obscured episodes of accretion onto supermassive black holes. the 70-month swift/bat all-sky survey, which probes the 14-195 kev energy range, has currently detected 838 agns. we report here on the broadband x-ray (0.3... | bat agn spectroscopic survey. v. x-ray properties of the swift/bat 70-month agn catalog |
this report summarizes the findings of the cf1 topical subgroup to snowmass 2021, which was focused on particle dark matter. one of the most important scientific goals of the next decade is to reveal the nature of dark matter (dm). to accomplish this goal, we must delve deep, to cover high priority targets including we... | report of the topical group on particle dark matter for snowmass 2021 |
an axion-like field comprising ∼10 % of the energy density of the universe near matter-radiation equality is a candidate to resolve the hubble tension; this is the "early dark energy" (ede) model. however, as shown in hill et al., the model fails to simultaneously resolve the hubble tension and maintain a good fit to b... | constraining early dark energy with large-scale structure |
the well-known tensions on the cosmological parameters h_0 and σ _8 within the λ cdm cosmology shown by the planck-cmb and lss data are possibly due to the systematics in the data or our ignorance of some new physics beyond the λ cdm model. in this letter, we focus on the second possibility, and investigate a minimal e... | dark sector interaction: a remedy of the tensions between cmb and lss data |
announcing the release v7.2 of the milliquas (million quasars) catalogue which presents all published quasars to 30 april 2021, including vlass radio associations for the first time, and concluding the audit of quasars from sdss-dr16q and earlier sdss releases. the totals are 829666 classified type-i qsos/agn, 703348 q... | the million quasars (milliquas) v7.2 catalogue, now with vlass associations. the inclusion of sdss-dr16q quasars is detailed |
we present a brief overview of attempts to construct de sitter vacua in string theory and explain how the results of this 20-year endeavor could point to the fact that string theory harbors no de sitter vacua at all. making such a statement is often considered controversial and “bad news for string theory”. we discuss ... | what if string theory has no de sitter vacua? |
we undertake a careful analysis of stochastic gravitational wave production from cosmological phase transitions in an expanding universe, studying both a standard radiation as well as a matter dominated history. we analyze in detail the dynamics of the phase transition, including the false vacuum fraction, bubble lifet... | phase transitions in an expanding universe: stochastic gravitational waves in standard and non-standard histories |
we introduce the uchuu suite of large high-resolution cosmological n-body simulations. the largest simulation, named uchuu, consists of 2.1 trillion (12 8003) dark matter particles in a box of side-length 2.0 $\, h^{-1} \, \rm gpc$, with particle mass of 3.27 × 108$\, h^{-1}\, \rm m_{\odot }$. the highest resolution si... | the uchuu simulations: data release 1 and dark matter halo concentrations |
one of the simplest viable models for dark matter is an additional neutral scalar, stabilised by a z_2 symmetry. using the gambit package and combining results from four independent samplers, we present bayesian and frequentist global fits of this model. we vary the singlet mass and coupling along with 13 nuisance para... | status of the scalar singlet dark matter model |
we critically examine the state of current constraints on the dark energy (de) equation of state (eos) $w$. our study is partially motivated by the observation that, while broadly consistent with the cosmological constant value $w=-1$, several independent probes appear to point towards a slightly phantom eos ($w \sim -... | the state of the dark energy equation of state circa 2023 |
we study a new source of stochastic gravitational wave background (sgwb) from the final collapse of a string-wall network. in the context of $n_{\rm dw}=1$ axionic string-wall network, the final collapse of walls bounded by strings can release gravitational waves (gws). this source is typically considered negligible du... | stochastic gravitational wave background: birth from axionic string-wall death |
kination denotes an era in the cosmological history corresponding to an equation of state $\omega=+1$ such that the total energy density of the universe redshifts as the sixth inverse power of the scale factor. this arises if the universe is dominated by the kinetic energy of a scalar field. it has often been motivated... | kination cosmology from scalar fields and gravitational-wave signatures |
active galactic nuclei (agn) are powered by the accretion of material onto a supermassive black hole (smbh) and are among the most luminous objects in the universe. however, the huge radiative power of most agn cannot be seen directly, as the accretion is hidden behind gas and dust that absorb many of the characteristi... | obscured active galactic nuclei |
dark matter could be a composite state of a confining sector with an approximate scale symmetry. we consider the case where the associated pseudo-goldstone boson, the dilaton, mediates its interactions with the standard model. when the confining phase transition in the early universe is supercooled, its dynamics allows... | supercool composite dark matter beyond 100 tev |
it is commonly assumed that the energy density of the universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. while the abundance of light elements indicates that the universe was radiation dominated during big bang nucleosynthesis (bbn), there is sca... | the first three seconds: a review of possible expansion histories of the early universe |
rotations of an axion field in field space provide a natural origin for an era of kination domination, where the energy density is dominated by the kinetic term of the axion field, preceded by an early era of matter domination. remarkably, no entropy is produced at the end of matter domination and hence these eras of m... | gravitational wave and cmb probes of axion kination |
we measure the anisotropic clustering of the quasar sample from data release 16 (dr16) of the sloan digital sky survey iv extended baryon oscillation spectroscopic survey (eboss). a sample of 343 708 spectroscopically confirmed quasars between redshift 0.8 < z < 2.2 are used as tracers of the underlying dark matt... | the completed sdss-iv extended baryon oscillation spectroscopic survey: bao and rsd measurements from anisotropic clustering analysis of the quasar sample in configuration space between redshift 0.8 and 2.2 |
we have used the publicly released dark energy survey (des) data to hunt for new satellites of the milky way (mw) in the southern hemisphere. our search yielded a large number of promising candidates. in this paper, we announce the discovery of nine new unambiguous ultra-faint objects, whose authenticity can be establi... | beasts of the southern wild: discovery of nine ultra faint satellites in the vicinity of the magellanic clouds. |
what is the maximum possible strength of a first-order electroweak phase transition and the resulting gravitational wave (gw) signal? while naively one might expect that supercooling could increase the strength of the transition to very high values, for strong supercooling the universe is no longer radiation-dominated ... | on the maximal strength of a first-order electroweak phase transition and its gravitational wave signal |
a new generation of neutrino experiments is testing the 4.7 σ anomalous excess of electronlike events observed in miniboone. this is of huge importance for particle physics, astrophysics, and cosmology, not only because of the potential discovery of physics beyond the standard model, but also because the lessons we wil... | microboone and the νe interpretation of the miniboone low-energy excess |
we present a new bound on the ultralight axion (ula) dark matter mass ma, using the lyman-alpha forest to look for suppressed cosmic structure growth: a 95% lower limit ma>2 ×10-20 ev . this strongly disfavors (>99.7 % credibility) the canonical ula with 10-22 ev <ma<10-21 ev , motivated by the string axive... | strong bound on canonical ultralight axion dark matter from the lyman-alpha forest |
identifying the nature of dark matter (dm) has long been a pressing question for particle physics. in the face of ever-more-powerful exclusions and null results from large-exposure searches for tev-scale dm interacting with nuclei, a significant amount of attention has shifted to lighter (sub-gev) dm candidates. direct... | searches for light dark matter using condensed matter systems |
we revisit the cosmological and astrophysical constraints on the fraction of the dark matter in primordial black holes (pbhs) with an extended mass function. we consider a variety of mass functions, all of which are described by three parameters: a characteristic mass and width and a dark matter fraction. various obser... | primordial black hole constraints for extended mass functions |
new physics increasing the expansion rate just prior to recombination is among the least unlikely solutions to the hubble tension and would be expected to leave an important signature in the early integrated sachs-wolfe (eisw) effect, a source of cosmic microwave background (cmb) anisotropies arising from the time vari... | consistency tests of λ cdm from the early integrated sachs-wolfe effect: implications for early-time new physics and the hubble tension |
we discuss the most general field equations for cosmological spacetimes for theories of gravity based on non-linear extensions of the non-metricity scalar and the torsion scalar. our approach is based on a systematic symmetry-reduction of the metric-affine geometry which underlies these theories. while for the simplest... | revisiting cosmologies in teleparallelism |
on 2022 july 13, nasa released to the whole world the data obtained by the james webb space telescope (jwst) early release observations (ero). these are the first set of science-grade data from this long-awaited facility, marking the beginning of a new era in astronomy. in the study of the early universe, jwst will all... | first batch of z ≈ 11-20 candidate objects revealed by the james webb space telescope early release observations on smacs 0723-73 |
we present the data release 12 quasar catalog (dr12q) from the baryon oscillation spectroscopic survey (boss) of the sloan digital sky survey iii. this catalog includes all sdss-iii/boss objects that were spectroscopically targeted as quasar candidates during the full survey and that are confirmed as quasars via visual... | the sloan digital sky survey quasar catalog: twelfth data release |
the neutrino floor is a theoretical lower limit on wimp-like dark matter models that are discoverable in direct detection experiments. it is commonly interpreted as the point at which dark matter signals become hidden underneath a remarkably similar-looking background from neutrinos. however, it has been known for some... | new definition of the neutrino floor for direct dark matter searches |
the dark energy spectroscopic instrument (desi) is currently measuring the spectra of 40\,million galaxies and quasars, the largest such survey ever made to probe the nature of cosmological dark energy. the 4-meter mayall telescope at kitt peak national observatory has been adapted for desi, including the construction ... | the optical corrector for the dark energy spectroscopic instrument |
there is a growing sense of `crisis' in the dark-matter particle community, which arises from the absence of evidence for the most popular candidates for dark-matter particles—such as weakly interacting massive particles, axions and sterile neutrinos—despite the enormous effort that has gone into searching for these pa... | a new era in the search for dark matter |
the supersymmetric model is one of the most attractive extensions of the standard model of particle physics. in light of the most recently reported anomaly of the muon g -2 measurement by the fermilab e989 experiment, and the excesses of gamma rays at the galactic center observed by fermi-lat space telescope, as well a... | a common origin of muon g-2 anomaly, galaxy center gev excess and ams-02 anti-proton excess in the nmssm |
primordial black holes (pbhs) have long been a candidate for the elusive dark matter (dm), and remain poorly constrained in the ∼20 - 100 m⊙ mass range. pbh binaries were recently suggested as the possible source of ligo's first detections. in this paper, we thoroughly revisit existing estimates of the merger rate of p... | merger rate of primordial black-hole binaries |
the recently detected stochastic signal by several pulsar timing array collaborations, offers an opportunity to scrutinize the fundamental properties of gravity, including the potential mass of the graviton. in this study, we analyze the nanograv 15-year data set to search for a stochastic gravitational wave background... | constraining the graviton mass with the nanograv 15-year data set |
recently, several major pulsar timing array (pta) collaborations have assembled strong evidence for the existence of a gravitational-wave background at frequencies around the nanohertz regime. assuming that the pta signal is attributed to scalar-induced gravitational waves, we jointly employ the pta data from the nanog... | simultaneously probing the sound speed and equation of state of the early universe with pulsar timing arrays |
the existence of ultralight axion (ula) with mass o (10-26ev) is not favored by the cmb observations in the standard λcdm model. we show that the inclusion of early dark energy (ede) will lift the cmb-lockdown on such ula, and possibly other forms of dark matter beyond cold dark matter. by performing monte carlo markov... | alleviating both h0 and s8 tensions: early dark energy lifts the cmb-lockdown on ultralight axion |
we report upper limits on the epoch of reionization 21 cm power spectrum at redshifts 7.9 and 10.4 with 18 nights of data (~36 hr of integration) from phase i of the hydrogen epoch of reionization array (hera). the phase i data show evidence for systematics that can be largely suppressed with systematic models down to ... | first results from hera phase i: upper limits on the epoch of reionization 21 cm power spectrum |
formation of cosmological solitons is generically accompanied by production of gravitational waves (gws), with a universal gw background expected at frequency scales below that of non-linear dynamics. beginning with a general phenomenological description of gws associated with soliton formation, we demonstrate that uni... | axion universal gravitational wave interpretation of pulsar timing array data |
we propose a relativistic gravitational theory leading to modified newtonian dynamics, a paradigm that explains the observed universal galactic acceleration scale and related phenomenology. we discuss phenomenological requirements leading to its construction and demonstrate its agreement with the observed cosmic microw... | new relativistic theory for modified newtonian dynamics |
we derive analytic bounds on the shape of the primordial power spectrum in the context of single-field inflation. in particular, the steepest possible growth has a spectral index of ns - 1 = 4 once transients have died down. its primary implication is that any constraint on the power spectrum at a particular scale can ... | steepest growth of the power spectrum and primordial black holes |
using some of the latest cosmological data sets publicly available, we derive the strongest bounds in the literature on the sum of the three active neutrino masses, mν, within the assumption of a background flat λ cdm cosmology. in the most conservative scheme, combining planck cosmic microwave background temperature a... | unveiling ν secrets with cosmological data: neutrino masses and mass hierarchy |
we report on the discovery of frb 20200120e, a repeating fast radio burst (frb) with a low dispersion measure (dm) detected by the canadian hydrogen intensity mapping experiment frb project. the source dm of 87.82 pc cm-3 is the lowest recorded from an frb to date, yet it is significantly higher than the maximum expect... | a nearby repeating fast radio burst in the direction of m81 |
we propose a novel enhancement mechanism of the curvature perturbations in the nonminimal derivative coupling inflation model with a coupling parameter related to the inflaton field. by considering a special form of the coupling parameter as a function of the inflaton, a period of ultra-slow-roll inflation can be reali... | primordial black holes from inflation with nonminimal derivative coupling |
the investigation of primordial non-gaussianities holds immense importance in testing the inflation paradigm and shedding light on the physics of the early universe. in this study, we conduct the first complete analysis of scalar-induced gravitational waves (sigws) by simultaneously incorporating the local-type non-gau... | complete analysis of scalar-induced gravitational waves and primordial non-gaussianities $f_{\\mathrm{nl}}$ and $g_{\\mathrm{nl}}$ |
we revisit the one-loop correction in curvature perturbation power spectrum in models of single field inflation which undergo a phase of ultra slow-roll (usr) inflation. we include the contributions from both the cubic and quartic interaction hamiltonians and calculate the one-loop corrections on the spectrum of the cm... | one-loop corrections in power spectrum in single field inflation |
the event horizon telescope has recently provided the first image of the dark shadow around the supermassive black hole m87*. the observation of a highly circular shadow provides strong limits on deviations of m87*'s quadrupole moment from the kerr value. we show that the absence of such a deviation can be used to cons... | hunting for extra dimensions in the shadow of m87* |
we report the detection of continuous positional and polarization changes of the compact source sgra* in high states ("flares") of its variable near-infrared emission with the near-infrared gravity-very large telescope interferometer (vlti) beam-combining instrument. in three prominent bright flares, the position centr... | detection of orbital motions near the last stable circular orbit of the massive black hole sgra* |
we construct an updated extended compilation of distinct (but possibly correlated) f σ8(z ) redshift space distortion (rsd) data published between 2006 and 2018. it consists of 63 datapoints and is significantly larger than previously used similar data sets. after fiducial model correction we obtain the best fit ω0 m-σ... | evolution of the f σ8 tension with the planck15 /λ cdm determination and implications for modified gravity theories |
we conduct large scale numerical simulations of gravitational wave production at a first-order vacuum phase transition. we find a power law for the gravitational wave power spectrum at high wave number which falls off as k-1.5 rather than the k-1 produced by the envelope approximation. the peak of the power spectrum is... | gravitational waves from vacuum first-order phase transitions: from the envelope to the lattice |
dark matter interactions with electrons or protons during the early universe leave imprints on the cosmic microwave background and the matter power spectrum, and can be probed through cosmological and astrophysical observations. these interactions lead to momentum and heat exchange between the ordinary and dark matter ... | cosmological constraints on dark matter interactions with ordinary matter |
the concordance model (λ cold dark matter (λcdm) model, where λ is the cosmological constant) reproduces the main current cosmological observations1-4 assuming the validity of general relativity at all scales and epochs and the presence of cdm and of λ, equivalent to dark energy with a constant density in space and tim... | cosmological constraints from the hubble diagram of quasars at high redshifts |
we present the methodology for and detail the implementation of the dark energy survey (des) 3x2pt des year 1 (y1) analysis, which combines configuration-space two-point statistics from three different cosmological probes: cosmic shear, galaxy-galaxy lensing, and galaxy clustering, using data from the first year of des... | dark energy survey year 1 results: multi-probe methodology and simulated likelihood analyses |
astrophysical observations spanning dwarf galaxies to galaxy clusters indicate that dark matter (dm) halos are less dense in their central regions compared to expectations from collisionless dm n -body simulations. using detailed fits to dm halos of galaxies and clusters, we show that self-interacting dm (sidm) may pro... | dark matter halos as particle colliders: unified solution to small-scale structure puzzles from dwarfs to clusters |
we present x-ray source catalogs for the ≈7 ms exposure of the chandra deep field-south (cdf-s), which covers a total area of 484.2 arcmin2. utilizing wavdetect for initial source detection and acis extract for photometric extraction and significance assessment, we create a main source catalog containing 1008 sources t... | the chandra deep field-south survey: 7 ms source catalogs |
we consider the simplest possibility for a model of particle dark matter in which dark matter has only gravitational interaction with the standard model sector. even in such a case, it is known that the gravitational particle production in an expanding universe may lead to a correct relic abundance depending on the ina... | production of purely gravitational dark matter: the case of fermion and vector boson |
we consider the possibility of an interaction in the dark sector in the presence of massive neutrinos and study the observational constraints on three different scenarios of massive neutrinos using the most recent cosmic microwave background anisotropy data in combination with type ia supernovae, baryon acoustic oscill... | probing the interaction between dark matter and dark energy in the presence of massive neutrinos |
we report on the discovery and analysis of bursts from nine new repeating fast radio burst (frb) sources found using the canadian hydrogen intensity mapping experiment (chime) telescope. these sources span a dispersion measure (dm) range of 195-1380 pc cm-3. we detect two bursts from three of the new sources, three bur... | nine new repeating fast radio burst sources from chime/frb |
we perform a joint analysis of the counts and weak lensing signal of redmapper clusters selected from the dark energy survey (des) year 1 dataset. our analysis uses the same shear and source photometric redshifts estimates as were used in the des combined probes analysis. our analysis results in surprisingly low values... | dark energy survey year 1 results: cosmological constraints from cluster abundances and weak lensing |
homogeneous oscillations of the inflaton after inflation can be unstable to small spatial perturbations even without coupling to other fields. we show that for inflaton potentials ∝|ϕ |2n near |ϕ |=0 and flatter beyond some |ϕ |=m , the inflaton condensate oscillations can lead to self-resonance, followed by its comple... | self-resonance after inflation: oscillons, transients, and radiation domination |
the polarized thermal emission from diffuse galactic dust is the main foreground present in measurements of the polarization of the cosmic microwave background (cmb) at frequencies above 100 ghz. in this paper we exploit the uniqueness of the planck hfi polarization data from 100 to 353 ghz to measure the polarized dus... | planck intermediate results. xxx. the angular power spectrum of polarized dust emission at intermediate and high galactic latitudes |
we study the contribution to the qcd axion dark matter abundance that is produced by string defects during the so-called scaling regime. clear evidence of scaling violations is found, the most conservative extrapolation of which strongly suggests a large number of axions from strings. in this regime, nonlinearities at ... | more axions from strings |
cosmic string networks offer one of the best prospects for detection of cosmological gravitational waves (gws). the combined incoherent gw emission of a large number of string loops leads to a stochastic gw background (sgwb), which encodes the properties of the string network. in this paper we analyze the ability of th... | probing the gravitational wave background from cosmic strings with lisa |
we propose two-dimensional materials as targets for direct detection of dark matter. using graphene as an example, we focus on the case where dark matter scattering deposits sufficient energy on a valence-band electron to eject it from the target. we show that the sensitivity of graphene to dark matter of mev to gev ma... | directional detection of dark matter with two-dimensional targets |
although cosmic microwave background and large scale structure probe the largest scales of our universe with ever-increasing precision, our knowledge about the smaller scales is still very limited other than the bounds on primordial black holes (pbhs). we show that the statistical properties of the small scale quantum ... | imprints of primordial non-gaussianity on gravitational wave spectrum |
the study of polarized dust emission has become entwined with the analysis of the cosmic microwave background (cmb) polarization in the quest for the curl-like b-mode polarization from primordial gravitational waves and the low-multipole e-mode polarization associated with the reionization of the universe. we used the ... | planck 2018 results. xi. polarized dust foregrounds |
this white paper provides a comprehensive review of our present understanding of experimental neutrino anomalies that remain unresolved, charting the progress achieved over the last decade at the experimental and phenomenological level, and sets the stage for future programmatic prospects in addressing those anomalies.... | white paper on light sterile neutrino searches and related phenomenology |
despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, λ cdm. this is motivated by a range of apparently serious theoretical issues, involving such questions as the cosmological constant problem, the particle nature of dark matter, t... | beyond λ cdm: problems, solutions, and the road ahead |
we present a novel mechanism for gravitational wave generation in the early universe. light spectator scalar fields during inflation can acquire a blue-tilted power spectrum due to stochastic effects. we show that this effect can lead to large curvature perturbations at small scales (induced by the spectator field fluc... | gravitational waves from stochastic scalar fluctuations |
we present a non-perturbative method for calculating the abundance of primordial black holes given an arbitrary one-point probability distribution function for the primordial curvature perturbation, $p(\zeta)$ ?> . a non-perturbative method is essential when considering non-gaussianities that cannot be treated using... | non-perturbative non-gaussianity and primordial black holes |
final results are reported from operation of the pico-60 c3f8 dark matter detector, a bubble chamber filled with 52 kg of c3 f8 located in the snolab underground laboratory. the chamber was operated at thermodynamic thresholds as low as 1.2 kev without loss of stability. a new blind 1404-kg-day exposure at 2.45 kev thr... | dark matter search results from the complete exposure of the pico-60 c3f8 bubble chamber |
we present new limits on an isotropic stochastic gravitational-wave background (gwb) using a six pulsar data set spanning 18 yr of observations from the 2015 european pulsar timing array data release. performing a bayesian analysis, we fit simultaneously for the intrinsic noise parameters for each pulsar, along with co... | european pulsar timing array limits on an isotropic stochastic gravitational-wave background |
the answer is yes. we indeed find that interacting dark energy can alleviate the current tension on the value of the hubble constant h0 between the cosmic microwave background anisotropies constraints obtained from the planck satellite and the recent direct measurements reported by riess et al. 2016. the combination of... | can interacting dark energy solve the h0 tension? |
we study the implications of the recently proposed trans-planckian censorship conjecture (tcc) for early universe cosmology and in particular inflationary cosmology. the tcc leads to the conclusion that if we want inflationary cosmology to provide a successful scenario for cosmological structure formation, the energy s... | trans-planckian censorship and inflationary cosmology |
we analyse the clustering of the sloan digital sky survey iv extended baryon oscillation spectroscopic survey data release 16 luminous red galaxy sample (dr16 eboss lrg) in combination with the high redshift tail of the sloan digital sky survey iii baryon oscillation spectroscopic survey data release 12 (dr12 boss cmas... | the completed sdss-iv extended baryon oscillation spectroscopic survey: measurement of the bao and growth rate of structure of the luminous red galaxy sample from the anisotropic power spectrum between redshifts 0.6 and 1.0 |
we present jwst extragalactic medium-band survey, the first public medium-band imaging survey carried out using jwst/nircam and niriss. these observations use ~2 and ~4 μm medium-band filters (nircam f182m, f210m, f430m, f460m, f480m; and niriss f430m and f480m in parallel) over 15.6 arcmin2 in the hubble ultra deep fi... | jems: a deep medium-band imaging survey in the hubble ultra deep field with jwst nircam and niriss |
we review conceptual aspects of inflationary scenarios able to produce primordial black holes by amplifying the size of curvature fluctuations to the level required to trigger black hole formation. we identify general mechanisms to do so, both for single- and multiple-field inflation. in single-field inflation, the spe... | inflation and primordial black holes |
the mismatch between the locally measured expansion rate of the universe and the one inferred from the cosmic microwave background measurements by planck in the context of the standard λcdm, known as the hubble tension, has become one of the most pressing problems in cosmology. a large number of amendments to the λcdm ... | why reducing the cosmic sound horizon alone can not fully resolve the hubble tension |
ngc 4258 is a critical galaxy for establishing the extragalactic distance scale and estimating the hubble constant ({h}0). water masers in the nucleus of the galaxy orbit about its supermassive black hole, and very long baseline interferometric observations of their positions, velocities, and accelerations can be model... | an improved distance to ngc 4258 and its implications for the hubble constant |
the event horizon telescope image of the supermassive black hole in the galaxy m87 is dominated by a bright, unresolved ring. general relativity predicts that embedded within this image lies a thin "photon ring," which is composed of an infinite sequence of self-similar subrings that are indexed by the number of photon... | universal interferometric signatures of a black hole's photon ring |
it is known that the single-field inflation with a transient ultra-slow-roll phase can produce a large curvature perturbation at small scales for the formation of primordial black holes. in our previous work, we have considered quantum loop corrections to the curvature perturbation and found that the growth of these sm... | primordial perturbations from ultra-slow-roll single-field inflation with quantum loop effects |
we propose a new four-parameter entropy function that generalizes the tsallis, rényi, barrow, sharma-mittal, kaniadakis and loop quantum gravity entropies for suitable limits of the parameters. consequently, we address the early and late universe cosmology corresponding to the proposed four-parameter entropy function. ... | early and late universe holographic cosmology from a new generalized entropy |
we perform a blinded cosmology analysis with cosmic shear two-point correlation functions measured from more than 25 million galaxies in the hyper suprime-cam three-year shear catalog in four tomographic redshift bins ranging from 0.3 to 1.5. after conservative masking and galaxy selection, the survey covers 416 deg2 o... | hyper suprime-cam year 3 results: cosmology from cosmic shear two-point correlation functions |
we analyse the large-scale clustering in fourier space of emission line galaxies (elg) from the data release 16 of the sloan digital sky survey iv extended baryon oscillation spectroscopic survey. the elg sample contains 173 736 galaxies covering 1170 deg2 in the redshift range 0.6 < z < 1.1. we perform a bao mea... | the completed sdss-iv extended baryon oscillation spectroscopic survey: measurement of the bao and growth rate of structure of the emission line galaxy sample from the anisotropic power spectrum between redshift 0.6 and 1.1 |
we measure the clustering of quasars of the final data release (dr16) of eboss. the sample contains $343\, 708$ quasars between redshifts 0.8 ≤ z ≤ 2.2 over $4699\, \mathrm{deg}^2$. we calculate the legendre multipoles (0,2,4) of the anisotropic power spectrum and perform a bao and a full-shape (fs) analysis at the eff... | the completed sdss-iv extended baryon oscillation spectroscopic survey: bao and rsd measurements from the anisotropic power spectrum of the quasar sample between redshift 0.8 and 2.2 |
we construct an updated and extended compilation of growth-rate data based on recent redshift-space distortion measurements. the data set consists of 34 data points and includes corrections for model dependence. in order to minimize overlap and maximize the independence of the data points, we also construct a subsample... | tension and constraints on modified gravity parametrizations of geff(z ) from growth rate and planck data |
we present a comprehensive catalog and analysis of broadband afterglow observations for 103 short-duration gamma-ray bursts (grbs), comprised of all short grbs from 2004 november to 2015 march with prompt follow-up observations in the x-ray, optical, near-infrared (nir), and/or radio bands. these afterglow observations... | a decade of short-duration gamma-ray burst broadband afterglows: energetics, circumburst densities, and jet opening angles |
polycyclic aromatic hydrocarbons and polycyclic aromatic nitrogen heterocycles are thought to be widespread throughout the universe, because these classes of molecules are probably responsible for the unidentified infrared bands, a set of emission features seen in numerous galactic and extragalactic sources. despite th... | detection of the aromatic molecule benzonitrile (c-c6h5cn) in the interstellar medium |
we present in this work a new calculation of the standard-model benchmark value for the effective number of neutrinos, $n_{\rm eff}^{\rm sm}$, that quantifies the cosmological neutrino-to-photon energy densities. the calculation takes into account neutrino flavour oscillations, finite-temperature effects in the quantum... | towards a precision calculation of the effective number of neutrinos n_eff in the standard model. part ii. neutrino decoupling in the presence of flavour oscillations and finite-temperature qed |
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