Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Jaan Einasto"'
Autor:
Jaan Einasto
The concepts of dark matter and the cosmic web are some of the most significant developments in cosmology in the past century. They have decisively changed the classical cosmological paradigm, which was first elaborated upon during the first half of
Autor:
Maret Einasto, Peeter Tenjes, Mirt Gramann, Heidi Lietzen, Rain Kipper, Lauri Juhan Liivamägi, Elmo Tempel, Shishir Sankhyayan, Jaan Einasto
High-density cores (HDCs) of galaxy superclusters that embed rich clusters and groups of galaxies are the earliest large objects to form in the cosmic web, and the largest objects that may collapse in the present or future. We study the dynamical sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a66ebcb1ebc3394326c62dbb6a10fb02
Our aim is to understand the effect of environment to galaxy quenching in various local and global environments. We focus on galaxies with very old stellar populations (VO galaxies), typically found in the centers of clusters and groups, and search f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5368a969136218364736dbcdbc250ba7
Autor:
Jaan Einasto
The concepts of dark matter and the cosmic web are some of the most significant developments in cosmology in the past century. They have decisively changed the classical cosmological paradigm, which was first elaborated upon during the first half of
Autor:
Pekka Heinämäki, Elmo Tempel, T. Tuvikene, M. Einasto, Lauri Juhan Liivamägi, H. Lietzen, Jaan Einasto, Boris Deshev, Peeter Tenjes, G. Chon
We study the properties, connectivity, and galaxy content of groups and filaments in the low-density region (cocoon) around A2142 supercluster (SClA2142). We traced the SClA2142 cocoon boundaries by the lowest luminosity-density regions that separate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad0b7ab5d545fb75b5a8875219987e22
http://arxiv.org/abs/2007.04910
http://arxiv.org/abs/2007.04910
We investigate the evolution of superclusters and supercluster cocoons (basins of attraction), and the influence of cosmological parameters to the evolution. We perform numerical simulations of the evolution of the cosmic web for different cosmologic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4d5d851b4bbe28f95e90b6e1eb86bbc
http://arxiv.org/abs/2005.03480
http://arxiv.org/abs/2005.03480
We calculated spatial correlation functions of galaxies, $\xi(r)$, structure functions, $g(r)=1 +\xi(r)$, gradient functions, $\gamma(r)= d \log g(r)/ d \log r$, and fractal dimension functions, $D(r)= 3+\gamma(r)$, using dark matter particles of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d44e2c1a0a345feb468aaed8fa3bcba6
Publikováno v:
Astronomy & Astrophysics. 652:A94
Methods. We perform numerical simulations of the evolution of the cosmic web for the conventional LCDM model. The simulations cover a wide range of box sizes L = 256 - 4000 Mpc/h, mass and force resolutions and epochs from very early moments z = 30 t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2818b2baf32e28421df5e40e5c4854ca
https://doi.org/10.1051/0004-6361/202039999
https://doi.org/10.1051/0004-6361/202039999
{We study biasing as a physical phenomenon by analysing geometrical and clustering properties of density fields of matter and galaxies.} {Our goal is to determine the bias function using a combination of geometrical and power spectrum analysis of sim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbb5f43692a55a5f7a216d4d01e69cfb
http://arxiv.org/abs/1906.03617
http://arxiv.org/abs/1906.03617
Aims. We investigate how properties of the ensemble of superclusters in the cosmic web evolve with time. Methods. We perform numerical simulations of the evolution of the cosmic web using the LambdaCDM model in box sizes L0 = 1024, 512, 256 Mpc/h. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af844818599f0c62ce83e81632cbab4e