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pro vyhledávání: '"Kolatt, Tsafrir S."'
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Autor:
Wechsler, Risa H., Somerville, Rachel S., Bullock, James S., Kolatt, Tsafrir S., Primack, Joel R., Blumenthal, George R., Dekel, Avishai
Publikováno v:
Astrophys.J. 554 (2001) 85-103
We use N-body simulations combined with semi-analytic models to compute the clustering properties of modeled galaxies at z~3, and confront these predictions with the clustering properties of the observed population of Lyman-break galaxies (LBGs). Sev
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011261
Autor:
Bullock, James S., Dekel, Avishai, Kolatt, Tsafrir S., Kravtsov, Andrey V., Klypin, Anatoly A., Porciani, Cristiano, Primack, Joel R.
Publikováno v:
Astrophys.J.555:240-257,2001
[Abridged] We study the angular-momentum profiles of a statistical sample of halos drawn from a high-resolution N-body simulation of the LCDM cosmology. We find that the cumulative mass distribution of specific angular momentum, j, in a halo of mass
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011001
Autor:
Kolatt, Tsafrir S., Bullock, James S., Sigad, Yair, Kravtsov, Andrey V., Klypin, Anatoly A., Primack, Joel R., Dekel, Avishai
[Abridged] The interaction rates of dark-matter halos and subhalos, are computed using high-resolution cosmological N-body simulations of the Lambda-CDM model. Although the number fraction of subhalos of mass $>2x10^{11}\hsolmass$ is only ~10%, we fi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010222
Autor:
Kolatt, Tsafrir S., Bullock, James S., Dekel, Avishai, Primack, Joel R., Sigad, Yair, Kravtsov, Andrey V., Klypin, Anatoly A.
[Abridged] We analyze the exchange of dark matter between halos, subhalos, and their environments in a high-resolution cosmological N-body simulation of a Lambda CDM cosmology. At each analyzed redshift z we divide the dark matter particles into 4 co
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010223
Autor:
Kolatt, Tsafrir S., Lahav, Ofer
Publikováno v:
Mon.Not.Roy.Astron.Soc. 323 (2001) 859
A combined sample of 79 high and low redshift supernovae Ia (SNe) is used to set constraints on the degree of anisotropy in the Universe out to $z\simeq1$. First we derive the global most probable values of matter density $\Omega_M $, the cosmologica
Externí odkaz:
http://arxiv.org/abs/astro-ph/0008041
Autor:
Sigad, Yair, Kolatt, Tsafrir S., Bullock, James S., Kravtsov, Andrey V., Klypin, Anatoly A., Primack, Joel R., Dekel, Avishai
We study the distribution functions of mass and circular velocity for dark matter halos in N-body simulations of the $\Lambda$CDM cosmology, addressing redshift and environmental dependence. The dynamical range enables us to resolve subhalos and dist
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005323
Autor:
Bullock, James S., Kolatt, Tsafrir S., Sigad, Yair, Somerville, Rachel S., Kravtsov, Andrey V., Klypin, Anatoly A., Primack, Joel R., Dekel, Avishai
Publikováno v:
Mon.Not.Roy.Astron.Soc.321:559-575,2001
We study dark-matter halo density profiles in a high-resolution N-body simulation of an LCDM cosmology. Our statistical sample contains ~5000 haloes in the range 10^{11}-10^{14} M_sun. The profiles are parameterized by an NFW form with two parameters
Externí odkaz:
http://arxiv.org/abs/astro-ph/9908159
Autor:
Gonzalez, Anthony H., Williams, Kurtis A., Bullock, James S., Kolatt, Tsafrir S., Primack, Joel R.
We present a galaxy circular velocity function, Psi(log v), derived from existing luminosity functions and luminosity-velocity relations. Such a velocity function is desirable for several reasons. First, it enables an objective comparison of luminosi
Externí odkaz:
http://arxiv.org/abs/astro-ph/9908075
Autor:
Kolatt, Tsafrir S., Bullock, James S., Somerville, Rachel S., Sigad, Yair, Jonsson, Patrik, Kravtsov, Andrey V., Klypin, Anatoly A., Primack, Joel R., Faber, Sandra M., Dekel, Avishai
Lyman break galaxies (LBGs) at $z \sim 3$ exhibit number densities and clustering similar to local $L_*$ galaxies; however, their star formation rates (SFRs) are much higher. We explore the scenario in which LBGs are starburst galaxies triggered by c
Externí odkaz:
http://arxiv.org/abs/astro-ph/9906104