134 citations · 484 across the 17 of their papers we have counts for
5 papers · 1 filter
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…
The structure of dark matter halos: self-similar models versus N-body simulations
Leonid Chuzhoy
We derive the density profile of cold dark matter halos using a self-similar accretion model. We show that if the clumpiness of the infalling matter is taken into account, then the…
Recognizing the First Radiation Sources Through Their 21-cm Signature
Leonid Chuzhoy, Marcelo A. Alvarez, Paul R. Shapiro
At the beginning of the reionization epoch, radiation sources produce fluctuations in the redshifted 21-cm background. We show that different types of sources (such as miniquasars,…
Heating and cooling of the intergalactic medium by resonance photons
Leonid Chuzhoy, Paul R. Shapiro
During the epoch of reionization a large number of photons were produced with frequencies below the hydrogen Lyman limit. After redshifting into the closest resonance, these photon…
Helium preenrichment in the star-forming regions
Leonid Chuzhoy
We show that element diffusion can produce large fluctuations in the initial helium abundance of the star-forming clouds. Diffusion time-scale, which in stars is much larger than t…