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Probing Galaxy Formation with TeV Gamma Ray Absorption
Joel R. Primack, James S. Bullock, Rachel S. Somerville +1
We present here the extragalactic background light (EBL) predicted by semi-analytic models of galaxy formation, and show how measurements of the absorption of gamma rays of …
Constraining the IMF using TeV gamma ray absorption
J. S. Bullock, R. S. Somerville, D. MacMinn +1
Gamma rays of ~TeV energies from distant sources suffer attenuation due to pair production off of ~1 micron EBL photons. We may exploit this process in order to indirectly measure…
Making Damped Lyman Alpha Systems in Semi-Analytic Models
Ariyeh H. Maller, Rachel S. Somerville, Jason X. Prochaska +1
The velocity profiles of weak metal absorption lines can be used to observationally probe the kinematic state of gas in damped Lyman-alpha systems. Prochaska and Wolfe have argued…
Cosmological Implications of Lyman-Break Galaxy Clustering
Risa H. Wechsler, Michael A. K. Gross, Joel R. Primack +3
We review our analysis of the clustering properties of ``Lyman-break'' galaxies (LBGs) at redshift z~3, previously discussed in Wechsler et al (1998). We examine the likelihood of…
Formation of Dark Matter Halos
J. R. Primack, J. S. Bullock, A. A. Klypin +1
This article concerns the formation and structure of dark matter halos, including (1) their radial density profiles, (2) their abundance, and (3) their merger rates. The last topic…
The Star Formation History in a Hierarchical Universe
Rachel S. Somerville, Joel R. Primack
Observations now probe the star formation history of the Universe back to a redshift of . We investigate whether the predictions of semi-analytic models of galaxy formation…