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the detection of gravitational waves from mergers of tens of solar mass black hole binaries has led to a surge in interest in primordial black holes (pbhs) as a dark matter candidate. we aim to provide a (relatively) concise overview of the status of pbhs as a dark matter candidate, circa summer 2020. first we review t... | primordial black holes as a dark matter candidate |
we describe the nirspec component of the jwst deep extragalactic survey (jades), and provide deep spectroscopy of 253 sources targeted with the nirspec micro-shutter assembly in the hubble ultra deep field and surrounding goods-south. the multi-object spectra presented here are the deepest so far obtained with jwst, am... | jades nirspec initial data release for the hubble ultra deep field: redshifts and line fluxes of distant galaxies from the deepest jwst cycle 1 nirspec multi-object spectroscopy |
we study gravitational waves (gws) induced by non-gaussian curvature perturbations. we calculate the density parameter per logarithmic frequency interval, ωgw(k ), given that the power spectrum of the curvature perturbation pr(k ) has a narrow peak at some small scale k*, with a local-type non-gaussianity, and constrai... | gravitational waves induced by non-gaussian scalar perturbations |
evidence for a stochastic gravitational wave background in the nhz frequency band is recently reported by four pulsar timing array collaborations nanograv, epta, cpta, and ppta. it can be interpreted by gravitational waves from collapsing domain walls in the early universe. we assume such domain walls arising from the ... | nano-hertz gravitational waves from collapsing domain walls associated with freeze-in dark matter in light of pulsar timing array observations |
quasars are the most luminous non-transient objects known and as a result they enable studies of the universe at the earliest cosmic epochs. despite extensive efforts, however, the quasar ulas j1120 + 0641 at redshift z = 7.09 has remained the only one known at z > 7 for more than half a decade. here we report obser... | an 800-million-solar-mass black hole in a significantly neutral universe at a redshift of 7.5 |
the most widely studied formation mechanism of a primordial black hole (pbh) is collapse of large-amplitude perturbation on small scales generated in single-field inflation. in this letter, we calculate one-loop correction to the large-scale power spectrum in such a model. we find models producing appreciable amount of... | ruling out primordial black hole formation from single-field inflation |
lisa, the laser interferometer space antenna, will usher in a new era in gravitational-wave astronomy. as the first anticipated space-based gravitational-wave detector, it will expand our view to the millihertz gravitational-wave sky, where a spectacular variety of interesting new sources abound: from millions of ultra... | waveform modelling for the laser interferometer space antenna |
we present cosmological constraints from a cosmic shear analysis of the fourth data release of the kilo-degree survey (kids-1000), which doubles the survey area with nine-band optical and near-infrared photometry with respect to previous kids analyses. adopting a spatially flat standard cosmological model, we find s8 =... | kids-1000 cosmology: cosmic shear constraints and comparison between two point statistics |
four decades after its prediction, the axion remains the most compelling solution to the strong-cp problem and a well-motivated dark matter candidate, inspiring a host of elegant and ultrasensitive experiments based on axion-photon mixing. this article reviews the experimental situation on several fronts. the microwave... | experimental searches for the axion and axion-like particles |
we explore the possibility that a confining first-order phase transition of a nearly-conformal dark sector generates the reported nanograv signal of a stochastic gravitational wave background. the visible standard model (sm) sector and the dark sector are initially thermally decoupled so that their temperatures are dif... | nanograv signal from a dark conformal phase transition |
the forward physics facility (fpf) is a proposal to create a cavern with the space and infrastructure to support a suite of far-forward experiments at the large hadron collider during the high luminosity era. located along the beam collision axis and shielded from the interaction point by at least 100 m of concrete and... | the forward physics facility: sites, experiments, and physics potential |
hyper suprime-cam (hsc) is a wide-field imaging camera on the prime focus of the 8.2-m subaru telescope on the summit of mauna kea in hawaii. a team of scientists from japan, taiwan, and princeton university is using hsc to carry out a 300-night multi-band imaging survey of the high-latitude sky. the survey includes th... | the hyper suprime-cam ssp survey: overview and survey design |
local measurements of the hubble parameter are increasingly in tension with the value inferred from a λcdm fit to the cosmic microwave background (cmb) data. in this paper, we construct scenarios in which evolving scalar fields significantly ease this tension by adding energy to the universe around recombination in a n... | rock 'n' roll solutions to the hubble tension |
the dwarf spheroidal satellite galaxies (dsphs) of the milky way are some of the most dark matter (dm) dominated objects known. we report on γ -ray observations of milky way dsphs based on six years of fermi large area telescope data processed with the new pass8 event-level analysis. none of the dsphs are significantly... | searching for dark matter annihilation from milky way dwarf spheroidal galaxies with six years of fermi large area telescope data |
we present a catalog of 536 fast radio bursts (frbs) detected by the canadian hydrogen intensity mapping experiment fast radio burst (chime/frb) project between 400 and 800 mhz from 2018 july 25 to 2019 july 1, including 62 bursts from 18 previously reported repeating sources. the catalog represents the first large sam... | the first chime/frb fast radio burst catalog |
we present new arcminute-resolution maps of the cosmic microwave background temperature and polarization anisotropy from the atacama cosmology telescope, using data taken from 2013-2016 at 98 and 150 ghz. the maps cover more than 17,000 deg2, the deepest 600 deg2 with noise levels below 10μk-arcmin. we use the power sp... | the atacama cosmology telescope: dr4 maps and cosmological parameters |
recently, observational hints for supermassive black holes have been accumulating, which has inspired ones to wonder: can primordial black holes (pbhs) be supermassive, in particular with the mass $m\gtrsim 10^{9}m_\odot$? a supercritical bubble (with an inflating baby universe inside it) that nucleated during inflatio... | supermassive primordial black holes in multiverse: for nano-hertz gravitational wave and high-redshift jwst galaxies |
although dark matter is a central element of modern cosmology, the history of how it became accepted as part of the dominant paradigm is often ignored or condensed into an anecdotal account focused around the work of a few pioneering scientists. the aim of this review is to provide a broader historical perspective on t... | history of dark matter |
gravitational waves (gws) were recently detected for the first time. this revolutionary discovery opens a new way of learning about particle physics through gws from first-order phase transitions (fopts) in the early universe. fopts could occur when new fundamental symmetries are spontaneously broken down to the standa... | cosmological phase transitions: from perturbative particle physics to gravitational waves |
whether or not the primordial gravitational wave (gw) produced during inflation is sufficiently strong to be observable, gws are necessarily produced from the primordial curvature perturbations in the second order of perturbation. the induced gws can be enhanced by curvature perturbations enhanced at small scales or by... | semianalytic calculation of gravitational wave spectrum nonlinearly induced from primordial curvature perturbations |
we consider the possibility that the black-hole (bh) binary detected by ligo may be a signature of dark matter. interestingly enough, there remains a window for masses 20 m⊙≲mbh≲100 m⊙ where primordial black holes (pbhs) may constitute the dark matter. if two bhs in a galactic halo pass sufficiently close, they radiate... | did ligo detect dark matter? |
the second-generation of gravitational-wave detectors are just starting operation, and have already yielding their first detections. research is now concentrated on how to maximize the scientific potential of gravitational-wave astronomy. to support this effort, we present here design targets for a new generation of de... | exploring the sensitivity of next generation gravitational wave detectors |
various pulsar timing array (pta) experiments (nanograv, epta, ppta, cpta, including data from inpta) very recently reported evidence for excess red common-spectrum signals in their latest datasets, with inter-pulsar correlations following the hellings-downs pattern, pointing to a stochastic gravitational wave backgrou... | inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments |
over recent decades, the role of torsion in gravity has been extensively investigated along the main direction of bringing gravity closer to its gauge formulation and incorporating spin in a geometric description. here we review various torsional constructions, from teleparallel, to einstein-cartan, and metric-affine g... | f(t) teleparallel gravity and cosmology |
a century ago, einstein formulated his elegant and elaborate theory of general relativity, which has so far withstood a multitude of empirical tests with remarkable success. notwithstanding the triumphs of einstein's theory, the tenacious challenges of modern cosmology and of particle physics have motivated the explora... | a systematic approach to generalisations of general relativity and their cosmological implications |
we review theories of dark matter (dm) beyond the collisionless paradigm, known as self-interacting dark matter (sidm), and their observable implications for astrophysical structure in the universe. self-interactions are motivated, in part, due to the potential to explain long-standing (and more recent) small scale str... | dark matter self-interactions and small scale structure |
a cosmic first-order phase transition occurring at the mev scale provides an attractive explanation for the nano-hertz gravitational wave (gw) background, which is indicated by the recent pulsar timing array data from the nanograv, cpta, epta, and ppta collaborations. we propose this explanation can be further tested a... | collider test of nano-hertz gravitational waves from pulsar timing arrays |
recently, strong evidence for a gravitational wave background has been reported by collaborations of pulsar timing arrays (pta). in the framework of scalar-induced gravitational waves (sigws), we concurrently investigate the second and third order gravitational waves by jointly analyzing pta data, alongside big-bang nu... | constraints on scalar-induced gravitational waves up to third order from joint analysis of bbn, cmb, and pta data |
the remarkable hubble space telescope (hst) data sets from the candels, hudf09, hudf12, ers, and borg/hippies programs have allowed us to map the evolution of the rest-frame uv luminosity function (lf) from z∼ 10 to z∼ 4. we develop new color criteria that more optimally utilize the full wavelength coverage from the op... | uv luminosity functions at redshifts z ∼ 4 to z ∼ 10: 10,000 galaxies from hst legacy fields |
recently, the nanograv, ppta, epta and cpta collaborations reported compelling evidence of the existence of the stochastic gravitational-wave background (sgwb). the amplitude and spectrum of this inferred gravitational-wave background align closely with the astrophysical predictions for a signal originating from the po... | dark matter spike surrounding supermassive black holes binary and the nanohertz stochastic gravitational wave background |
several pulsar timing array collaborations recently reported evidence of a stochastic gravitational wave background (sgwb) at nhz frequencies. whilst the sgwb could originate from the merger of supermassive black holes, it could be a signature of new physics near the 100 mev scale. supercooled first-order phase transit... | can supercooled phase transitions explain the gravitational wave background observed by pulsar timing arrays? |
we present the calibration and reduction of event horizon telescope (eht) 1.3 mm radio wavelength observations of the supermassive black hole candidate at the center of the radio galaxy m87 and the quasar 3c 279, taken during the 2017 april 5-11 observing campaign. these global very long baseline interferometric observ... | first m87 event horizon telescope results. iii. data processing and calibration |
we present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg. reconstructed from cmb measurements made by the atacama cosmology telescope (act) from 2017 to 2021. in combination with bao measurements (from sdss and 6df), we obtain the amplitude of matter fluctuations $\sigma_8 = 0.819... | the atacama cosmology telescope: dr6 gravitational lensing map and cosmological parameters |
in this paper we describe the survey design for the ultradeep nirspec and nircam observations before the epoch of reionization (uncover) cycle 1 jwst treasury program, which executed its early imaging component in november 2022. the uncover survey includes ultradeep ($\sim29-30\mathrm{ab}$) imaging of $\sim$45 arcmin$^... | the jwst uncover treasury survey: ultradeep nirspec and nircam observations before the epoch of reionization |
the current cosmological probes have provided a fantastic confirmation of the standard λ cold dark matter cosmological model, which has been constrained with unprecedented accuracy. however, with the increase of the experimental sensitivity, a few statistically significant tensions between different independent cosmolo... | cosmology intertwined ii: the hubble constant tension |
we investigate the potential for observing gravitational waves from cosmological phase transitions with lisa in light of recent theoretical and experimental developments. our analysis is based on current state-of-the-art simulations of sound waves in the cosmic fluid after the phase transition completes. we discuss the... | detecting gravitational waves from cosmological phase transitions with lisa: an update |
primordial black holes (pbhs) can be formed from the collapse of large-amplitude perturbation on small scales in the early universe. such an enhanced spectrum can be realized by introducing a flat region in the potential of single-field inflation, which makes the inflaton go into a temporary ultraslow-roll (usr) period... | response to criticism on "ruling out primordial black hole formation from single-field inflation\'\': a note on bispectrum and one-loop correction in single-field inflation with primordial black hole formation |
we review sterile neutrinos as possible dark matter candidates. after a short summary on the role of neutrinos in cosmology and particle physics, we give a comprehensive overview of the current status of the research on sterile neutrino dark matter. first we discuss the motivation and limits obtained through astrophysi... | sterile neutrino dark matter |
a standard scenario to form primordial black holes in the early universe is based on a phase of ultra-slow-roll in single-field inflation when the amplitude of the short scale modes is enhanced compared to the cmb plateau. based on general arguments, we show that the loop corrections to the large-scale linear power spe... | the primordial black hole formation from single-field inflation is not ruled out |
euclid is a european space agency medium-class mission selected for launch in 2020 within the cosmic vision 2015-2025 program. the main goal of euclid is to understand the origin of the accelerated expansion of the universe. euclid will explore the expansion history of the universe and the evolution of cosmic structure... | cosmology and fundamental physics with the euclid satellite |
we present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ∼450 deg2 of imaging data from the kilo degree survey (kids). for a flat λ cold dark matter (λcdm) cosmology with a prior on h0 that encompasses the most recent direct measurements, we find s_8≡ σ _8√{ω _m/0.3}=0.745... | kids-450: cosmological parameter constraints from tomographic weak gravitational lensing |
for a discrete symmetry that is anomalous under qcd, the domain walls produced in the early universe from its spontaneous breaking can naturally annihilate due to qcd instanton effects. the gravitational waves generated from wall annihilation have their amplitude and frequency determined by both the discrete symmetry b... | qcd-collapsed domain walls: qcd phase transition and gravitational wave spectroscopy |
in this letter, we derive for the first time a characteristic three-peaked gw signal within the framework of no-scale supergravity, being the low-energy limit of superstring theory. we concentrate on the primordial gravitational wave (gw) spectrum induced due to second-order gravitational interactions by inflationary c... | gravitational wave signatures of no-scale supergravity in nanograv and beyond |
we examine the possibility of primordial black holes (pbhs) formation in single-field models of inflation. using the adiabatic or wave function renormalization scheme in the short-range modes, we show that one-loop correction to the power spectrum is free from quadratic uv divergence. we consider a framework in which p... | no-go for the formation of heavy mass primordial black holes in single field inflation |
context. measurement of the galactic neutral atomic hydrogen (h i) column density, nh i, and brightness temperatures, tb, is of high scientific value for a broad range of astrophysical disciplines. in the past two decades, one of the most-used legacy h i datasets has been the leiden/argentine/bonn survey (lab).aims: we... | hi4pi: a full-sky h i survey based on ebhis and gass |
we extend the cosmological bootstrap to correlators involving massless particles with spin. in de sitter space, these correlators are constrained both by symmetries and by locality. in particular, the de sitter isometries become conformal symmetries on the future boundary of the spacetime, which are reflected in a set ... | the cosmological bootstrap: spinning correlators from symmetries and factorization |
event horizon telescope (eht) observations at 230 ghz have now imaged polarized emission around the supermassive black hole in m87 on event-horizon scales. this polarized synchrotron radiation probes the structure of magnetic fields and the plasma properties near the black hole. here we compare the resolved polarizatio... | first m87 event horizon telescope results. viii. magnetic field structure near the event horizon |
axions are hypothetical particles that may explain the observed dark matter density and the non-observation of a neutron electric dipole moment. an increasing number of axion laboratory searches are underway worldwide, but these efforts are made difficult by the fact that the axion mass is largely unconstrained. if the... | dark matter from axion strings with adaptive mesh refinement |
in this letter we evaluate whether the gravitational wave background recently observed by a number of different pulsar timing arrays could be due to merging primordial supermassive black hole binaries. we find that for homogeneously distributed primordial black holes this possibility is inconsistent with strong cosmolo... | do pulsar timing arrays observe merging primordial black holes? |
several pulsar timing array (pta) collaborations have recently provided strong evidence for a nhz stochastic gravitational-wave background (sgwb). here we investigate the implications of a first-order phase transition occurring within the early universe's dark quantum chromodynamics (dqcd) epoch, specifically within th... | mirror qcd phase transition as the origin of the nanohertz stochastic gravitational-wave background |
the origin of interstellar and intergalactic magnetic fields remains largely unknown. one possibility is that they are related to the primordial magnetic fields (pmfs) produced by, for instance, the phase transitions of the early universe. in this letter, we show that the pmf-induced turbulence generated at around the ... | primordial magnetic field as a common solution of nanohertz gravitational waves and hubble tension |
the possibility that the dark matter comprises primordial black holes (pbhs) is considered, with particular emphasis on the currently allowed mass windows at 1 016- 1 017 g , 1 020- 1 024 g and 1 - 1 03m⊙ . the planck mass relics of smaller evaporating pbhs are also considered. all relevant constraints (lensing, dynami... | primordial black holes as dark matter |
in response to a recent criticism, appeared in arxiv:2303.00341, we argue that the standard scenario to form primordial black holes in the early universe based on a phase of ultra-slow-roll in single-field inflation is not ruled out. | the primordial black hole formation from single-field inflation is still not ruled out |
composite topological structures such as superheavy "quasistable strings" (qss) and "walls bounded by strings" (wbs) arise in realistic extensions of the standard model of high energy physics. we show that the gravitational radiation emitted in the early universe by these two unstable structures with a dimensionless st... | superheavy quasistable strings and walls bounded by strings in the light of nanograv 15 year data |
the w -boson mass, which was recently measured at fermilab with an unprecedented precision, suggests the presence of new multiplets beyond the standard model (sm). one of the minimal extensions of the sm is to introduce an additional scalar doublet in which the non-sm scalars can enhance w -boson mass via the loop corr... | inert higgs dark matter for cdf ii w -boson mass and detection prospects |
we describe ongoing searches for intermediate-mass black holes with mbh ≈ 10-105 m⊙. we review a range of search mechanisms, both dynamical and those that rely on accretion signatures. we find the following conclusions: dynamical and accretion signatures alike point to a high fraction of 109-1010 m⊙ galaxies hosting bl... | intermediate-mass black holes |
recent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. these ideas are best understood in anti-de sitter space, where they rely on the area law for entanglement entropy. the extension to de sitter space requires taking into a... | emergent gravity and the dark universe |
using the $\delta n$ formalism we calculate the one-loop correction to the large-scale power spectrum of the curvature perturbation in the standard scenario where primordial black holes are formed in the early universe thanks to a phase of ultra-slow-roll in single-field inflation. we explicitly show that one-loop corr... | primordial black holes and loops in single-field inflation |
we present new measurements of cosmic microwave background (cmb) lensing over $9400$ sq. deg. of the sky. these lensing measurements are derived from the atacama cosmology telescope (act) data release 6 (dr6) cmb dataset, which consists of five seasons of act cmb temperature and polarization observations. we determine ... | the atacama cosmology telescope: a measurement of the dr6 cmb lensing power spectrum and its implications for structure growth |
we present the results of a first search for galaxy candidates at z ~ 9-15 on deep seven-band nircam imaging acquired as part of the glass-james webb space telescope (jwst) early release science program on a flanking field of the frontier fields cluster a2744. candidates are selected via two different renditions of the... | early results from glass-jwst. iii. galaxy candidates at z9-15 |
the pulsar timing array (pta) collaborations have recently reported compelling evidence for the presence of a stochastic signal consistent with a gravitational-wave background. in this letter, we combine the latest data sets from nanograv, ppta and epta collaborations to explore the cosmological interpretations for the... | cosmological interpretation for the stochastic signal in pulsar timing arrays |
the cosmological principle (cp)-the notion that the universe is spatially isotropic and homogeneous on large scales-underlies a century of progress in cosmology. it is conventionally formulated through the friedmann-lemaître-robertson-walker (flrw) cosmologies as the spacetime metric, and culminates in the successful a... | is the observable universe consistent with the cosmological principle? |
the nobel prize winning confirmation in 1998 of the accelerated expansion of our universe put into sharp focus the need of a consistent theoretical model to explain the origin of this acceleration. as a result over the past two decades there has been a huge theoretical and observational effort into improving our unders... | dynamical systems applied to cosmology: dark energy and modified gravity |
early jwst observations have uncovered a new, substantial population of red sources that might represent a previously overlooked phase of actively growing supermassive black holes (kocevski et al. 2023, matthee et al. 2023, labbe et al. 2023). one of the most intriguing examples is an extremely red, point-like object t... | a supermassive black hole in the early universe growing in the shadows |
we present constraints on weakly interacting massive particles (wimp)-nucleus scattering from the 2013 data of the large underground xenon dark matter experiment, including 1.4 ×104 kg day of search exposure. this new analysis incorporates several advances: single-photon calibration at the scintillation wavelength, imp... | improved limits on scattering of weakly interacting massive particles from reanalysis of 2013 lux data |
we study the imprint of new particles on the primordial cosmological fluctuations. new particles with masses comparable to the hubble scale produce a distinctive signature on the non-gaussianities. this feature arises in the squeezed limit of the correlation functions of primordial fluctuations. it consists of particul... | cosmological collider physics |
this paper presents the planck 2015 likelihoods, statistical descriptions of the 2-point correlationfunctions of the cosmic microwave background (cmb) temperature and polarization fluctuations that account for relevant uncertainties, both instrumental and astrophysical in nature. they are based on the same hybrid appro... | planck 2015 results. xi. cmb power spectra, likelihoods, and robustness of parameters |
ultra-light dark matter is a class of dark matter models (dm), where dm is composed by bosons with masses ranging from 10-24ev <m <ev . these models have been receiving a lot of attention in the past few years given their interesting property of forming a bose-einstein condensate (bec) or a superfluid on galactic... | ultra-light dark matter |
measurements of the hubble constant and, more generally, measurements of the expansion rate and distances over the interval 0 <z <1 appear to be inconsistent with the predictions of the standard cosmological model (λ cdm ) given observations of cosmic microwave background temperature and polarization anisotropies... | hubble constant hunter's guide |
the evidence of the nano-hertz stochastic gravitational wave (gw) background is reported by multiple pulsar timing array collaborations. while a prominent candidate of the origin is astrophysical from supermassive black hole binaries, alternative models involving gws induced by primordial curvature perturbations can ex... | translating nano-hertz gravitational wave background into primordial perturbations taking account of the cosmological qcd phase transition |
recent years have witnessed a rise in interest in the geometrical trinity of general relativity and its extensions. this interest has been fuelled by novel insights into the nature of gravity, the possibility to address computational and conceptual questions -- such as the determination of black hole entropy or the def... | review on $f(q)$ gravity |
aims: we describe the photometric content of the second data release of the gaia project (gaia dr2) and its validation along with the quality of the data.methods: the validation was mainly carried out using an internal analysis of the photometry. external comparisons were also made, but were limited by the precision an... | gaia data release 2. photometric content and validation |
we propose a new model-independent mechanism for producing primordial black holes from a period of multi-field inflation. this requires an enhancement of primordial fluctuations at short scales compared to their value at cmb scales. we show that such an amplification naturally occurs when the inflationary trajectory ex... | turning in the landscape: a new mechanism for generating primordial black holes |
the large synoptic survey telescope (lsst) dark energy science collaboration (desc) will use five cosmological probes: galaxy clusters, large scale structure, supernovae, strong lensing, and weak lensing. this science requirements document (srd) quantifies the expected dark energy constraining power of these probes ind... | the lsst dark energy science collaboration (desc) science requirements document |
gravitational waves (gws) have a great potential to probe cosmology. we review early universe sources that can lead to cosmological backgrounds of gws. we begin by presenting proper definitions of gws in flat space-time and in a cosmological setting (section 2). following, we discuss the reasons why early universe gw b... | cosmological backgrounds of gravitational waves |
axions are well-motivated dark matter candidates with simple cosmological production mechanisms. they were originally introduced to solve the strong cp problem, but also arise in a wide range of extensions to the standard model. this snowmass white paper summarizes axion phenomenology and outlines next-generation labor... | axion dark matter |
the laser interferometer space antenna (lisa) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle physics, from the mev to the planck scale. however, the range... | cosmology with the laser interferometer space antenna |
primordial nucleosynthesis is one of the three historical evidences for the big bang model, together with the expansion of the universe and the cosmic microwave background. there is a good global agreement between the computed primordial abundances of helium-4, deuterium, helium-3 and their values deduced from observat... | precision big bang nucleosynthesis with improved helium-4 predictions |
this article reviews current understanding of primordial black holes (pbhs), with particular focus on those massive examples (≳ 1015~g ) which remain at the present epoch, not having evaporated through hawking radiation. with the detection of gravitational waves by ligo, we have gained a completely novel observational ... | primordial black holes—perspectives in gravitational wave astronomy |
we review the status of bouncing cosmologies as alternatives to cosmological inflation for providing a description of the very early universe, and a source for the cosmological perturbations which are observed today. we focus on the motivation for considering bouncing cosmologies, the origin of fluctuations in these mo... | bouncing cosmologies: progress and problems |
we report results of a search for an isotropic gravitational-wave background (gwb) using data from advanced ligo's and advanced virgo's third observing run (o3) combined with upper limits from the earlier o1 and o2 runs. unlike in previous observing runs in the advanced detector era, we include virgo in the search for ... | upper limits on the isotropic gravitational-wave background from advanced ligo and advanced virgo's third observing run |
we present an incremental version (4fgl-dr3, for data release 3) of the fourth fermi large area telescope (lat) catalog of γ-ray sources. based on the first 12 years of science data in the energy range from 50 mev to 1 tev, it contains 6658 sources. the analysis improves on that used for the 4fgl catalog over eight yea... | incremental fermi large area telescope fourth source catalog |
in this letter we present a general covariant modified theory of gravity in d =4 spacetime dimensions which propagates only the massless graviton and bypasses lovelock's theorem. the theory we present is formulated in d >4 dimensions and its action consists of the einstein-hilbert term with a cosmological constant, ... | einstein-gauss-bonnet gravity in four-dimensional spacetime |
we discuss the issue of perturbativity in single-field inflationary models with a phase of ultra slow-roll (usr) tailor suited to generate an order-one abundance of primordial black holes (pbhs). more in detail, we impose the condition that loop corrections made up of short-wavelength modes enhanced by the usr dynamics... | one loop to rule them all: perturbativity in the presence of ultra slow-roll dynamics |
we perform a bayesian analysis of nanograv 15-yr and ipta dr2 pulsar timing residuals and show that the recently detected stochastic gravitational-wave background is compatible with a stochastic gravitational-wave background produced by bubble dynamics during a cosmological first-order phase transition. the timing data... | first-order phase transition interpretation of pulsar timing array signal is consistent with solar-mass black holes |
the nuclei of most normal galaxies contain supermassive black holes, which can accrete gas through a disk and become active. these active galactic nuclei (agns) can form jets that are observed on scales from astronomical units to megaparsecs and from meter wavelengths to tev energies. high-resolution radio imaging and ... | relativistic jets from active galactic nuclei |
the cresst-ii experiment uses cryogenic detectors to search for nuclear recoil events induced by the elastic scattering of dark matter particles in cawo_4 crystals. given the low energy threshold of our detectors in combination with light target nuclei, low mass dark matter particles can be probed with high sensitivity... | results on light dark matter particles with a low-threshold cresst-ii detector |
<related-article ext-link-type="doi" related-article-type="companion" xlink:href="10.1103/physrevd.105.023515"/>this work, together with its companion paper, secco, samuroff et al. [phys. rev. d 105, 023515 (2022), 10.1103/physrevd.105.023515], present the dark energy survey year 3 cosmic-shear measurements and c... | dark energy survey year 3 results: cosmology from cosmic shear and robustness to data calibration |
a nanohertz-frequency stochastic gravitational-wave background can potentially be detected through the precise timing of an array of millisecond pulsars. this background produces low-frequency noise in the pulse arrival times that would have a characteristic spectrum common to all pulsars and a well-defined spatial cor... | on the evidence for a common-spectrum process in the search for the nanohertz gravitational-wave background with the parkes pulsar timing array |
we report the results of a joint analysis of data from bicep2/keck array and planck. bicep2 and keck array have observed the same approximately 400 deg2 patch of sky centered on ra 0 h, dec. -57.5 ° . the combined maps reach a depth of 57 nk deg in stokes q and u in a band centered at 150 ghz. planck has observed the f... | joint analysis of bicep2/keck array and planck data |
this review presents a comprehensive overview of galaxy bias, that is, the statistical relation between the distribution of galaxies and matter. we focus on large scales where cosmic density fields are quasi-linear. on these scales, the clustering of galaxies can be described by a perturbative bias expansion, and the c... | large-scale galaxy bias |
using the effective field theory (eft) framework of single field inflation, we investigate the possibility of the formation of primordial black holes (pbhs) in the slow roll (sr) to ultra slow roll (usr) sharp transition. we demonstrate that, due to one-loop correction to the power spectrum, causality is violated (cs &... | pbh formation in eft of single field inflation with sharp transition |
we study the implications of planck data for models of dark energy (de) and modified gravity (mg) beyond the standard cosmological constant scenario. we start with cases where the de only directly affects the background evolution, considering taylor expansions of the equation of state w(a), as well as principal compone... | planck 2015 results. xiv. dark energy and modified gravity |
predicting structural properties of dark matter haloes is one of the fundamental goals of modern cosmology. we use the suite of multidark cosmological simulations to study the evolution of dark matter halo density profiles, concentrations, and velocity anisotropies. we find that in order to understand the structure of ... | multidark simulations: the story of dark matter halo concentrations and density profiles |
here we present 1701 light curves of 1550 unique, spectroscopically confirmed type ia supernovae (sne ia) that will be used to infer cosmological parameters as part of the pantheon+ sn analysis and the supernovae and h 0 for the equation of state of dark energy distance-ladder analysis. this effort is one part of a ser... | the pantheon+ analysis: the full data set and light-curve release |
recent observations have granted to us two unique insights into the early universe: the presence of a low-frequency stochastic gravitational wave background detected by the nanograv and pulsar timing array (pta) experiments and the emergence of unusually massive galaxy candidates at high redshifts reported by the james... | scrutinizing the primordial black holes interpretation of pta gravitational waves and jwst early galaxies |
we point out that the gravitational-wave event gw150914 observed by the ligo detectors can be explained by the coalescence of primordial black holes (pbhs). it is found that the expected pbh merger rate would exceed the rate estimated by the ligo scientific collaboration and the virgo collaboration if pbhs were the dom... | primordial black hole scenario for the gravitational-wave event gw150914 |
context. the third gaia data release is published in two stages. the early part, gaia edr3, gives very precise astrometric and photometric properties for nearly two billion sources together with seven million radial velocities from gaia dr2. the full release, gaia dr3, will add radial velocities, spectra, light curves,... | gaia early data release 3. catalogue validation |
we study in detail sub-gev dark matter scattering off electrons in xenon, including the expected electron recoil spectra and annual modulation spectra. we derive improved constraints using low-energy xenon10 and xenon100 ionization-only data. for xenon10, in addition to including electron-recoil data corresponding to a... | new constraints and prospects for sub-gev dark matter scattering off electrons in xenon |
very recently, several pulsar timing array collaborations, including cpta, epta, and nanograv, reported their results from searches for an isotropic stochastic gravitational wave background (sgwb), with each finding positive evidence for sgwb. in this work, we assessed the credibility of interpreting the hellings-downs... | gravitational wave sources for pulsar timing arrays |
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