1.4k citations · 42.7k across the 723 of their papers we have counts for
16 papers · 1 filter
Vacuum Decay Constraints on a Cosmological Scalar Field
Jeremy S. Heyl, Abraham Loeb
If the potential of a scalar field, Phi, which currently provides the ``dark energy'' of the universe, has a negative minimum -M_0^4, then quantum-mechanical fluctuations could nuc…
An Intergalactic Magnetic Field from Quasar Outflows
Steven Furlanetto, Abraham Loeb
Outflows from quasars inevitably pollute the intergalactic medium (IGM) with magnetic fields. The short-lived activity of a quasar leaves behind an expanding magnetized bubble in t…
Element Diffusion During Cosmological Structure Formation
David Medvigy, Abraham Loeb
We consider element diffusion during the linear growth of structure in the intergalactic medium (IGM) before the redshift of reionization. The elements produced during big bang nuc…
Stability of the Forward/Reverse Shock System Formed by the Impact of a Relativistic Fireball on an Ambient Medium
Xiaohu Wang, Abraham Loeb, Eli Waxman
We analyze the stability of a relativistic double (forward/reverse) shock system which forms when the fireball of a Gamma-Ray Burst (GRB) impacts on the surrounding medium. We find…
Novel Ways to Probe the Universe with Gamma-Ray Bursts and Quasars
Abraham Loeb
I consider novel ways by which Gamma-Ray Bursts (GRBs) and quasars can be used to probe the universe. Clues about how and when was the intergalactic medium ionized can be read off…
Constraining the Collisional Nature of the Dark Matter Through Observations of Gravitational Wakes
Steven Furlanetto, Abraham Loeb
We propose to use gravitational wakes as a direct observational probe of the collisional nature of the dark matter. We calculate analytically the structure of a wake generated by t…