48 citations · 67 across the 3 of their papers we have counts for
10 papers
Primordial magnetic fields and formation of molecular hydrogen
Shiv K Sethi, Biman B. Nath, Kandaswamy Subramanian
We study the implications of primordial magnetic fields for the thermal and ionization history of the post-recombination era. In particular we compute the effects of dissipation of…
Dynamical friction of radio galaxies in galaxy clusters
Biman B. Nath
The distribution of luminous radio galaxies in galaxy clusters has been observed to be concentrated in the inner region. We consider the role of dynamical friction of massive galax…
Limits on the AGN activities in X-ray underluminous galaxy groups
K. S. Dwarakanath, Biman B. Nath
We have observed four X-ray underluminous groups of galaxies using the Giant Meterwave RadioTelescope. The groups NGC 524, 720, 3607, and 4697 are underluminous in relation to the…
Cosmic rays, lithium abundance and excess entropy in galaxy clusters
Biman B. Nath, Piero Madau, Joseph Silk
We consider the production of Li in spallation reactions by cosmic rays in order to explain the observed abundance in halo metal-poor stars. We show that heating of ambient gas…
Self-regulated black hole accretion, the M-sigma relation, and the growth of bulges in galaxies
Mitchell C. Begelman, Biman B. Nath
We argue that the velocity dispersions and masses of galactic bulges and spheroids are byproducts of the feedback that regulates rapid black hole growth in protogalaxies. We sugges…
Entropy of the intracluster medium at high redshift
Biman B. Nath
Recent observations of entropy of intracluster medium (ICM) at high redshift are not consistent with a redshift independent entropy floor. In order to interpret these observations,…