Jeremiah P. Ostriker

TL;DR: The luminosity function of galaxies is derived from a cosmological hydrodynamic simulation of a Λ cold dark matter universe with the aid of a stellar population synthesis model.

TL;DR: In this paper, the authors studied the nonlinear clustering of dark matter particles in an expanding universe by N-body simulations and showed that stable clustering does not hold in an Ω = 1 universe to the extent their simulations can ascertain.

TL;DR: In this paper, the authors studied the mechanical and radiative feedback effects from the central active galactic nucleus (AGN) on the cosmological evolution of an isolated elliptical galaxy, where the inner boundary of the simulation domain is carefully chosen so that the fiducial Bondi radius is resolved and the accretion rate of the black hole is determined self-consistently.

TL;DR: In this article, the authors studied numerically thin accretion flows with finite thickness as well as those with vanishing thickness and showed that the governing equations become self-similar, involving no free parameters.

TL;DR: In this article, the physical properties of the Lycap alpha absorbing system seen in quasars were determined based on a variety of theoretical and observational constraints, with best estimates of the present intergalactic pressure and temperature.