A4 Refereed article in a conference publication

Galaxy Group Properties in Observations and Simulations




AuthorsNurmi P

EditorsVanDeWeygaert R, Shandarin S, Saar E, Einasto J

Conference nameSymposium of the International-Astronomical-Union (IAUS)

Publication year2016

JournalProceedings of the International Astronomical Union

Book title Zeldovich Universe: Genesis and Growth of the Cosmic Web

Journal name in sourceZELDOVICH UNIVERSE: GENESIS AND GROWTH OF THE COSMIC WEB

Journal acronymIAU SYMP P SERIES

Volume11

IssueS308

First page 205

Last page206

Number of pages2

ISBN978-1-107-07860-4

ISSN1743-9213

DOIhttps://doi.org/10.1017/S1743921316009856(external)


Abstract
In this project, we compare different properties of galaxy groups in cosmological N-body simulations and SDSS galaxy group catalogs. In the first part of the project (Nurmi et al. 2013) we compared the basic properties of the groups like the luminosity functions, group richness and velocity dispersion distributions and studied how good is the agreement between the mock group catalog and the SDSS group catalog. Here we continue the earlier study and use updated galaxy group catalog (SDSS DR10) and new simulation data (Guo et al. 2013). We reanalyse earlier group properties and include new properties in the analysis like group environment, star formation rates and group masses. Our analysis show that there are clear differences between the simulated and observed properties of galaxy groups, especially for small groups with a few members. Also, the high luminosities are clearly overestimated in the simulations compared with the SDSS group data.



Last updated on 2024-26-11 at 14:58