Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Lauri Juhan Liivamägi"'
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
Galaxy superclusters, the largest galaxy structures in the cosmic web, are formed due to the gravitational collapse (although they are not usually gravitationally bound). Their geometrical properties can shed light on the structure formation process
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f558fac2fcbecc8b293236d4f16d2a
http://arxiv.org/abs/2111.10253
http://arxiv.org/abs/2111.10253
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 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
Autor:
Peeter Tenjes, Pekka Heinämäki, Heidi Lietzen, Rain Kipper, Jaan Einasto, Lauri Juhan Liivamägi, Pasi Nurmi, Antti Tamm, Elmo Tempel, Maret Einasto
Publikováno v:
Astronomy & Astrophysics. 649:A51
We present a study of the Corona Borealis (CB) supercluster. We determined the high-density cores of the CB and the richest galaxy clusters in them, and studied their dynamical state and galaxy content. We determined filaments in the supercluster to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::338fd68ffbad7c10c819a3156ef3706d
https://doi.org/10.1051/0004-6361/202040200
https://doi.org/10.1051/0004-6361/202040200
Aims. We develop an extended percolation method to allow the comparison of geometrical properties of the real cosmic web with the simulated dark matter web for an ensemble of over- and under-density systems. Methods. We scan density fields of dark ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3703db13de2009c7f684f575856fef18
http://arxiv.org/abs/1805.05866
http://arxiv.org/abs/1805.05866
Autor:
Elmo Tempel, Lauri Juhan Liivamägi, Alina Streblyanska, Mirt Gramann, Jose Alberto Rubino-Martin, Enn Saar, Antonio D. Montero-Dorta, Claudia Maraston, Maret Einasto, Heidi Lietzen
Publikováno v:
Einasto, M, Lietzen, H, Gramann, M, Saar, E, Tempel, E, Liivamägi, L J, Montero-Dorta, A D, Streblyanska, A, Maraston, C & Rubiño-Martín, J A 2017, ' BOSS Great Wall : morphology, luminosity, and mass ', Astronomy and Astrophysics, vol. 603, A5 . https://doi.org/10.1051/0004-6361/201629105
We study the morphology, luminosity and mass of the superclusters from the BOSS Great Wall (BGW), a recently discovered very rich supercluster complex at the redshift $z = 0.47$. We have employed the Minkowski functionals to quantify supercluster mor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a73d951c3535c5141417a731c407a06f