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Dynamical constraints on the Local Group from the CMB and 2MRS dipoles
(Oxford University Press (OUP), 2008)
We place constraints on the dynamics of the Local Group (LG) by comparing the dipole of the Cosmic Microwave Background (CMB) with the peculiar velocity induced by the 2MRS galaxy sample. The analysis is limited by the ...
Brightening of an Accretion Disk due to Viscous Dissipation of Gravitational Waves during the Coalescence of Supermassive Black Holes
(American Physical Society, 2008-07-25)
Mergers of supermassive black hole binaries release peak power of up to similar to 10(57)erg s(-1) in gravitational waves (GWs). As the GWs propagate through ambient gas, they induce shear and a small fraction of their ...
Three-Body Kick to a Bright Quasar Out of Its Galaxy during a Merger
(American Astronomical Society, 2006)
The quasar HE 0450-2958 was recently discovered to reside similar to 7 kpc away from a galaxy that was likely disturbed by a recent merger. The lack of a massive spheroid of stars around the quasar raised the unlikely ...
Gravitational waves from scattering of stellar-mass black holes in galactic nuclei
(Oxford University Press, 2009)
Stellar-mass black holes (BHs) are expected to segregate and form a steep density cusp around supermassive black holes (SMBHs) in galactic nuclei. We follow the evolution of a multimass system of BHs and stars by numerically ...
Identifying Gamma-Ray Burst Remnants through Positron Annihilation Radiation
(American Astronomical Society, 2002)
We model the annihilation of relic positrons produced in a gamma-ray burst (GRB) after its afterglow has faded. We find that the annihilation signal from at least one GRB remnant in the Milky Way should be observable with ...
Probing the Epoch of Reionization with the Lyα Forest at Z ∼ 4-5
(American Astronomical Society, 2009)
The Expected Redshift Distribution of Gamma‐Ray Bursts
(American Astronomical Society, 2002)
Imprint of Inhomogeneous Reionization on the Power Spectrum of Galaxy Surveys at High Redshifts
(American Astronomical Society, 2006)
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 density modes makes reionization inhomogeneous ...
The 21 Centimeter Forest: Radio Absorption Spectra as Probes of Minihalos before Reionization
(American Astronomical Society, 2002)
We study the absorption along lines of sight toward high-z radio sources caused by the 21 cm transition of neutral hydrogen in the intergalactic medium (IGM) before reionization. Using semianalytic methods, we compute the ...
Hypervelocity collisions of binary stars at the Galactic Centre
(Oxford University Press, 2007)
Recent surveys have identified seven hypervelocity stars (HVSs) in the halo of the Milky Way. Most of these stars may have originated from the breakup of binary star systems by the nuclear black hole SgrA*. In some instances, ...