Nishikanta Khandai

TL;DR: In this article, the properties and clustering of halos, galaxies and blackholes to z = 0 in the high resolution hydrodynamical simulation MassiveBlack-II (MBII) were investigated.

TL;DR: In this paper, it was shown that steady high density cold gas flows responsible for assembling the first galaxies produce the high gas densities that lead to sustained critical accretion rates and hence rapid growth commensurate with the existence of ~109 M ☉ black holes as early as z ~ 7.

TL;DR: In this paper, the authors used a cosmological hydrodynamic simulation (MassiveBlack) covering a volume (0.75 \Gpc)^3 appropriate for studying the rare first quasars to show that steady high density cold gas flows responsible for assembling the first galaxies produce the high gas densities that lead to sustained critical accretion rates and hence rapid growth commensurate with the existence of ~10^9 solar mass black holes as early as z~7.

TL;DR: In this article, the distribution of neutral hydrogen (Hi) in the post-reionization universe is modeled using gravity-only N-body simulations and an ansatz to assign Hi to dark matter haloes that is consistent with observational constraints and theoretical models.

TL;DR: In this article, the shape and relative orientation of the stars and dark matter of halos and subhalos (central and satellite) extracted from the MassiveBlack-II simulation was investigated.