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Searching for Baryons with Chandra
L. A. Phillips, J. P. Ostriker
At low redshifts, measurements of the total baryon content in stars, atomic and molecular hydrogen, and cluster gas fall a factor of two to four below the baryon density derived fr…
Star Formation History and Stellar Metallicity Distribution in a Cold Dark Matter Universe
Kentaro Nagamine, Masataka Fukugita, Renyue Cen +1
We study star formation history and stellar metallicity distribution in galaxies in a Lambda cold dark matter universe using a hydrodynamic cosmological simulation. Our model predi…
Evolution of the Cluster Mass Function: Gpc^3 Dark Matter Simulations
Paul Bode, Neta A. Bahcall, Eric B. Ford +1
High-resolution N-body simulations of four popular Cold Dark Matter cosmologies (LCDM, OCDM, QCDM, and tilted SCDM), each containing 10^5 clusters of galaxies in a cubic gigaparsec…
Limits on Collisional Dark Matter from Elliptical Galaxies in Clusters
Oleg Y. Gnedin, Jeremiah P. Ostriker
The dynamical evolution of galaxies in clusters is modified if dark matter is self-interacting. Heat conduction from the hot cluster halo leads to evaporation of the relatively coo…
Semi-Analytical Models for Lensing by Dark Halos: I. Splitting Angles
Li-Xin Li, Jeremiah P. Ostriker
We use the semi-analytical approach to analyze gravitational lensing of quasars by dark halos in various cold dark matter (CDM) cosmologies, in order to determine the sensitivity o…
Halo Formation in Warm Dark Matter Models
Paul Bode, Jeremiah P. Ostriker, Neil Turok
Discrepancies have emerged between the predictions of standard cold dark matter (CDM) theory and observations of clustering on sub-galactic scales. Warm dark matter (WDM) is a simp…