A4 Vertaisarvioitu artikkeli konferenssijulkaisussa
Galaxy Group Properties in Observations and Simulations
Tekijät: Nurmi P
Toimittaja: VanDeWeygaert R, Shandarin S, Saar E, Einasto J
Konferenssin vakiintunut nimi: Symposium of the International-Astronomical-Union (IAUS)
Julkaisuvuosi: 2016
Journal: Proceedings of the International Astronomical Union
Kokoomateoksen nimi: Zeldovich Universe: Genesis and Growth of the Cosmic Web
Tietokannassa oleva lehden nimi: ZELDOVICH UNIVERSE: GENESIS AND GROWTH OF THE COSMIC WEB
Lehden akronyymi: IAU SYMP P SERIES
Vuosikerta: 11
Numero: S308
Aloitussivu: 205
Lopetussivu: 206
Sivujen määrä: 2
ISBN: 978-1-107-07860-4
ISSN: 1743-9213
DOI: https://doi.org/10.1017/S1743921316009856
Tiivistelmä
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.
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.
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