- Tel Aviv UniversityIL388 papers
- Centre National de la Recherche ScientifiqueFR320 papers
- Rutgers, The State University of New JerseyUS278 papers
- University of California, Santa CruzUS239 papers
- Weizmann Institute of ScienceIL223 papers
- California Institute of TechnologyUS202 papers
- University of California, BerkeleyUS194 papers
- Space Telescope Science InstituteUS128 papers
- Technion – Israel Institute of TechnologyIL118 papers
- Universidad Autónoma de MadridES113 papers
- University of ArizonaUS111 papers
- Johns Hopkins UniversityUS110 papers
26 papers · 2 filters
What Have We Learned From GRB Afterglows?
J. I. Katz, T. Piran
The discovery by BeppoSAX and coordinated ground-based observations of persistent X-ray, visible and radio counterparts to GRB has successfully concluded a search begin in 1973. Th…
CDM-Variant Cosmological Models - I: Simulations and Preliminary Comparisons
Michael A. K. Gross, Rachel S. Somerville, Joel R. Primack +2
We present two matched sets of five simulations each, covering five presently favored simple modifications to the standard cold dark matter (CDM) scenario. One simulation suite, wi…
Implications of Spikes in the Redshift Distribution of Galaxies
Risa H. Wechsler, Michael A. K. Gross, Joel R. Primack +2
We address the high peaks found by Steidel et al (1997) in the redshift distribution of ``Lyman-break'' objects (LBOs) at redshift z~3. The highest spike represents a relative over…
Spectra and Light Curves of Gamma-Ray Burst Afterglows
Re'em Sari, Tsvi Piran, Ramesh Narayan
The recently discovered GRB afterglow is believed to be described reasonably well by synchrotron emission from a slowing down relativistic shell that collides with an external medi…
BLR sizes and the X-ray spectrum in AGN
Amri Wandel, Thomas Boller
Recent ROSAT studies of narrow-line Seyfert 1 galaxies revealed these objects (with FWHM ) generally show steeper soft X-ray spectra than broad line Seyfert…
How to Plant a Merger Tree
Rachel S. Somerville, Tsafrir S. Kolatt
We investigate several approaches for constructing Monte Carlo realizations of the merging history of virialized dark matter halos (``merger trees'') using the extended Press-Schec…