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Galaxy Group Properties in Observations and Simulations

Published online by Cambridge University Press:  12 October 2016

Pasi Nurmi
Pasi Nurmi*
Affiliation:
University of Turku, Department of Physics and Astronomy, Tuorla Observatory, Finland email: [email protected]
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Abstract

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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.

Keywords

methods: numerical – methods: statistical – galaxies: clusters: general – cosmology: miscellaneous – large-scale structure of Universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 205 - 206
Copyright
Copyright © International Astronomical Union 2016 

References

Guo, Q., White, S., Angulo, R. E., et al. 2013, MNRAS, 428, 1351 CrossRefGoogle Scholar
Nurmi, P., Heinämäki, P., Sepp, T., et al. 2013, MNRAS, 439, 380 Google Scholar
Press, W. H. & Schechter, P. 1974, ApJ, 187 CrossRefGoogle Scholar
Sheth, R. & Tormen, G. 1999, MNRAS, 308 Google Scholar
Springel, V., White, S., Jenkins, A., et al. 2005, Nature, 435, 629 Google Scholar
Tempel, E., Tamm, A., Gramann, M., et al. 2014, A&A, 566, A1T Google Scholar