134 citations · 484 across the 17 of their papers we have counts for
17 papers
Relaxing constraints on dark matter annihilation
Leonid Chuzhoy
The relic abundance of thermal dark matter particles is generally assumed to be inversely proportional to their annihilation rate, which is therefore constrained by the present mat…
Reopening the window on charged dark matter
Leonid Chuzhoy, Edward W. Kolb
We reexamine the limits on charged dark matter particles. We show that if their mass and charge fall in the range 100(q_X/e)^2< m_X < 10^8(q_X/e) TeV, then magnetic fields prevent…
Impact of Dark Matter Annihilation on the High-Redshift Intergalactic Medium
Leonid Chuzhoy
We reexamine the impact of dark matter (DM) annihilation on the intergalactic medium, taking into account the clumping of DM particles. We find that energy injection from the annih…
Radiative Transfer Effect on Ultraviolet Pumping of the 21cm Line in the High Redshift Universe
Leonid Chuzhoy, Zheng Zheng
During the epoch of reionization the 21cm signal is sensitive to the scattering rate of the ultraviolet photons, redshifting across the Lyman_alpha resonance. Here we calculate the…
Feedback from first radiation sources: H- photodissociation
Leonid Chuzhoy, Michael Kuhlen, Paul R. Shapiro
During the epoch of reionization, the formation of radiation sources is accompanied by the growth of a H- photodissociating flux. We estimate the impact of this flux on the formati…
Can ambipolar diffusion solve the cosmic lithium problem?
Leonid Chuzhoy
Recent WMAP observations indicate that the primordial abundance of lithium should have been 2-4 times higher than the value measured in low-metallicity stars. We show that this dis…