1.4k citations · 42.7k across the 723 of their papers we have counts for
18 papers · 2 filters
Light-cone anisotropy in 21cm fluctuations during the epoch of reionization
Rennan Barkana, Abraham Loeb
The delay in light travel time along the line of sight generates an anisotropy in the power spectrum of 21cm brightness fluctuations from the epoch of reionization. We show that wh…
Three-Body Kick to a Bright Quasar out of Its Galaxy During a Merger
Loren Hoffman, Abraham Loeb
The quasar HE0450-2958 was recently discovered to reside ~7kpc away from a galaxy that was likely disturbed by a recent merger. The lack of a massive spheroid of stars around the q…
The Fate of Former Companions to Hypervelocity Stars Originating at the Galactic Center
Idan Ginsburg, Abraham Loeb
The hypervelocity star SDSS J090745.0+024507 in the halo of the Milky Way galaxy (Brown et al. 2005) most likely originated from the breakup of a binary star system by the central…
Detecting Reionization in the Star Formation Histories of High-Redshift Galaxies
Rennan Barkana, Abraham Loeb
The reionization of cosmic hydrogen, left over from the big bang, increased its temperature to >~ 1.e4 K. This photo-heating resulted in an increase of the minimum mass of galaxies…
Nonthermal THz to TeV Emission from Stellar Wind Shocks in the Galactic Center
Eliot Quataert, Abraham Loeb
The central parsec of the Galaxy contains dozens of massive stars with a cumulative mass loss rate of ~ 10^{-3} solar masses per year. Shocks among these stellar winds produce the…
Imprint of Inhomogeneous Reionization on the Power Spectrum of Galaxy Surveys at High Redshifts
Daniel Babich, Abraham Loeb
We consider the effects of inhomogeneous reionization on the distribution of galaxies at high redshifts. Modulation of the formation process of the ionizing sources by large scale…
Frequency-Dependent Shift in the Image Centroid of the Black Hole at the Galactic Center as a Test of General Relativity
Avery E. Broderick, Abraham Loeb
The inferred black hole in the Galactic center spans the largest angle on the sky among all known black holes. Forthcoming observational programs plan to localize or potentially re…
Cosmic Variance In the Transparency of the Intergalactic Medium After Reionization
Stuart Wyithe, Abraham Loeb
Following the completion of cosmic reionization, the mean-free-path of ionizing photons was set by a population of Ly-limit absorbers. As the mean-free-path steadily grew, the inte…
Constraints on the Proper Motion of the Andromeda Galaxy Based on the Survival of Its Satellite M33
Abraham Loeb, Mark J. Reid, Andreas Brunthaler +1
A major uncertainty in the dynamical history of the local group of galaxies originates from the unknown transverse speed of the Andromeda galaxy (M31) relative to the Milky Way. We…
The Remnants of Intergalactic Supernovae
Dan Maoz, Eli Waxman, Abraham Loeb
Intergalactic type-Ia supernovae (SNe-Ia) have been discovered recently in rich galaxy clusters, likely the descendants of an intergalactic stellar population found in recent years…
Constraints on the Process that Regulates the Growth of Supermassive Black Holes Based on the Intrinsic Scatter in the M_bh-sigma Relation
Stuart Wyithe, Abraham Loeb
We show that the observed scatter in the relations between the mass of supermassive black holes (SMBHs), M_bh, and the velocity dispersion sigma or mass M_sph of their host spheroi…
Prospects for Redshifted 21-cm observations of quasar HII regions
Stuart Wyithe, Abraham Loeb, David Barnes
The introduction of low-frequency radio arrays over the coming decade is expected to revolutionize the study of the reionization epoch. Observation of the contrast in redshifted 21…
The Small-Scale Power Spectrum of Cold Dark Matter
Abraham Loeb, Matias Zaldarriaga
One of the best motivated hypotheses in cosmology states that most of the matter in the universe is in the form of weakly-interacting massive particles that decoupled early in the…
Signature of Galactic Outflows as Absorption-Free Gaps in the Ly-alpha Forest
Taotao Fang, Abraham Loeb, David Tytler +2
Powerful outflows from star-forming galaxies are expected to push away the neutral intergalactic medium (IGM) around those galaxies, and produce absorption-free gaps in the Ly-alph…
Polarization of 21cm Radiation from the Epoch of Reionization
Daniel Babich, Abraham Loeb
We consider the polarization of 21cm line radiation from the epoch of reionization due to both intrinsically polarized emission and secondary mechanisms. We argue that Thomson scat…
Probing the Epoch of Early Baryonic Infall Through 21cm Fluctuations
Rennan Barkana, Abraham Loeb
After cosmological recombination, the primordial hydrogen gas decoupled from the cosmic microwave background (CMB) and fell into the gravitational potential wells of the dark matte…
A Dynamical Method for Measuring Masses of Stars with Transiting Planets
Abraham Loeb
As a planet transits the face of a star, it accelerates along the line-of-sight. The changing delay in the propagation of photons produces an apparent deceleration of the planet ac…
CMB B-mode polarization from Thomson scattering in the local universe
Christopher M. Hirata, Abraham Loeb, Niayesh Afshordi
[Abridged] The polarization of the CMB is widely recognized as a potential source of information about primordial gravitational waves. The gravitational wave contribution can be se…