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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 448176.0, MPI für Astronomie / Publikationen_mpia
The correlation of star formation quenching with internal galaxy properties and environment
Authors:Kimm, Taysun; Somerville, Rachel S.; Yi, Sukyoung K.; van den Bosch, Frank C.; Salim, Samir; Fontanot, Fabio; Monaco, Pierluigi; Mo, Houjun; Pasquali, Anna; Rich, R. M.; Yang, Xiaohu
Date of Publication (YYYY-MM-DD):2009
Title of Journal:Monthly Notices of the Royal Astronomical Society
Journal Abbrev.:MNRAS
Start Page:1131
End Page:1147
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We investigate the correlation of star formation quenching with internal galaxy properties and large-scale environment (halo mass) in empirical data and theoretical models. We make use of the halo-based group catalogue of Yang and collaborators, which is based on the Sloan Digital Sky Survey. Data from the Galaxy evolution explorer are also used to extract the recent star formation rate. In order to investigate the environmental effects, we examine the properties of `central' and `satellite' galaxies separately. For central galaxies, we are unable to conclude whether star formation quenching is primarily connected with halo mass or stellar mass, because these two quantities are themselves strongly correlated. For satellite galaxies, a nearly equally strong dependence on halo mass and stellar mass is seen. We make the same comparison for five different semi-analytic models based on three independently developed codes. We find that the models with active galactic nuclei feedback reproduce reasonably well the dependence of the fraction of central red and passive galaxies on halo mass and stellar mass. However, for satellite galaxies, the same models badly overproduce the fraction of red/passive galaxies and do not reproduce the empirical trends with stellar mass or halo mass. This satellite overquenching problem is caused by the too-rapid stripping of the satellites' hot gas haloes, which leads to rapid strangulation of star formation.
Free Keywords:galaxies: clusters: general; galaxies: evolution; galaxies: formation; galaxies: ISM
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009MNRAS.394.1131K [ID No:1]
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