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- Tel Aviv UniversityIL388 papers
- Centre National de la Recherche ScientifiqueFR320 papers
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- Weizmann Institute of ScienceIL223 papers
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119 papers · 1 filter
Gently Killing S--spaces
Todd Eisworth, Peter Nyikos, Saharon Shelah
We produce a model of ZFC in which there are no locally compact first countable S-spaces, and in which 2^{aleph_0}<2^{aleph_1}. A consequence of this is that in this model there ar…
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 …
On random sections of the cube
Yossi Lonke
Let denote the expected number of -faces of a random -section of the -cube. A formula for is presented, and for , a lower bound for $f(j,k,n…
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…