Zobrazeno 1 - 10
of 53
pro vyhledávání: '"R. Juszkiewicz"'
Autor:
L. N. da Costa, Scott W. Chambers, Riccardo Giovanelli, Michael Davis, James N. Fry, M. P. Haynes, Andrew H. Jaffe, R. Juszkiewicz, Enrique Gaztanaga, Mariangela Bernardi, Pedro G. Ferreira, Gary Wegner, Hume A. Feldman
Publikováno v:
The Astrophysical Journal. 596:L131-L134
Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density parameter Ωm and the amplitude of density fluctuations σ8. Our results suggest that our statistic is a robust and reproducible measure of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dfce6a220b8e8af87b0e0cf5e343a6b
https://doi.org/10.1086/379221
https://doi.org/10.1086/379221
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 274:730-744
An attractive and simple hypothesis for the formation of large-scale structure is that it developed by gravitational instability from primordial fluctuations with an initially Gaussian probability distribution. Non-linear gravitational evolution driv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::468fafdc0525e4c045d604582baa98f8
https://doi.org/10.1093/mnras/274.3.730
https://doi.org/10.1093/mnras/274.3.730
Autor:
R, Juszkiewicz, E, Gaztañaga
Publikováno v:
Annals of the New York Academy of Sciences. 927
We present two new dynamical tests of the biasing hypothesis. The first is based on the amplitude and the shape of the galaxy-galaxy correlation function, xi g(r), where r is the separation of the galaxy pair. The second test uses the mean relative p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::ecc5eb1265df64af6e40a1de9739f62d
https://pubmed.ncbi.nlm.nih.gov/11411154
https://pubmed.ncbi.nlm.nih.gov/11411154
Autor:
Enrique Gaztanaga, R. Juszkiewicz
We present two new dynamical tests of the biasing hypothesis. The first is based on the amplitude and the shape of the galaxy-galaxy correlation function, $\xi_g(r)$, where $r$ is the separation of the galaxy pair. The second test uses the mean relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bfab6247a7bbe919a6e5c5f5c3611dc
http://arxiv.org/abs/astro-ph/0007087
http://arxiv.org/abs/astro-ph/0007087
Autor:
Joseph Silk, R. Juszkiewicz
Publikováno v:
Scopus-Elsevier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31ce0d2a1d0c480495ee47471849d855
https://doi.org/10.1038/353386d0
https://doi.org/10.1038/353386d0
We propose a simple and accurate method for computing analytically the mass correlation function for cold dark matter and scale-free models that fits N-body simulations over a range that extends from the linear to the strongly non-linear regime. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d2c455eb49a5eb4a2f597ee70f044c4
http://arxiv.org/abs/astro-ph/9912395
http://arxiv.org/abs/astro-ph/9912395
Large-scale structures, observed today, are generally believed to have grown from random, small-amplitude inhomogeneities, present in the early Universe. We investigate how gravitational instability drives the distribution of these fluctuations away
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31fc710cec0b3d8516103839c16a4e36
Autor:
François R. Bouchet, Piotr Amsterdamski, R. Juszkiewicz, Michal Chodorowski, David H. Weinberg
We calculate the cosmological evolution of the 1-point probability distribution function (PDF), using an analytic approximation that combines gravitational perturbation theory with the Edgeworth expansion of the PDF. Our method applies directly to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6fd26b4c8e46def115e8cf4b1fd09b4
Publikováno v:
The Astrophysical Journal. 394:L5
The weakly nonlinear evolution of particle trajectories in Friedmann-Lemaitre models with zero cosmological constant is investigated. The matter is assumed to be a nonrelativistic pressureless fluid. A perturbative expansion in Lagrangian coordinates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::538808db25882b5d1f897c8dce205967
https://doi.org/10.1086/186459
https://doi.org/10.1086/186459
Publikováno v:
The Astrophysical Journal. 349:408
The magnitude and direction of the observed dipole anisotropy of the galaxy distribution can in principle constrain the amount of large-scale power present in the spectrum of primordial density fluctuations. This paper confronts the data, provided by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::748d67044e81c5463e5b489416cc1cfb
https://doi.org/10.1086/168324
https://doi.org/10.1086/168324