Abstract Details
| Name: Sandeep Kumar Kataria Affiliation: JAP-IIA, Bangalore Conference ID: ASI2018_551 Title : A study of Isolated halos distribution in Large-scale structures of universe Authors and Co-Authors : Sandeep Kumar,JAP-IIA Bangalore; Mousumi Das,IIA Bangalore; Benjamin, L'Huillier, KASI, Daejeon Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : We present a study of the mass spectrum and local environmental densities of isolated dark matter halos from high redshifts z~12 to the present universe z~0. For conducting this study we have used Horizon Run 4 (Kim & Changbom et al 2015) data products. Horizon Run 4 is an N-body simulation designed to study the evolutions of galaxies and large-scale structures of the Universe. In this simulation the halo mass resolution scales down to M_s = 2.7 × 10^{11} h^{-1} M_sun within a box size of 3150h^{-1}Mpc. This provides a large sample of isolated halos that can be used for a statistical study of these systems. We have found that isolated halos show a maximum in their probability distribution for over densites which correspond to values ranging from 0.1 to 1 at z~0. Apart from this non-isolated halos show a maximum in their probability distribution for over densities which varies from 1 to 10. We have also shown that masses for which isolated galaxies show maximum probability is more than non-isolated ones at z~0. This implies that most of the satellites of progenitors of isolated halos have merged into progenitors during their evolution. Further study includes merger tree history and the study of the spin evolution of these isolated halos with respect to redshift. |