Abstract
We review recent results on the dependence of various galaxy properties on environment at low redshift. As environmental indicators, we use group mass, group-centric radius, and the distinction between centrals and satellites; examined galaxy properties include star formation rate, colour, AGN fraction, age, metallicity and concentration. In general, satellite galaxies diverge more markedly from their central counterparts if they reside in more massive haloes. We show that these results are consistent with starvation being the main environmental effect, if one takes into account that satellites that reside in more massive haloes and at smaller halo-centric radii on average have been accreted a longer time ago. Nevertheless, environmental effects are not fully understood yet. In particular, it is puzzling that the impact of environment on a galaxy seems independent of its stellar mass. This may indicate that the stripping of the extended gas reservoir of satellite galaxies predominantly occurs via tidal forces rather than ram-pressure.
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Acknowledgements
We thank all our collaborators on this topic, in particular Houjun Mo, Xiaohu Yang, Guinevere Kauffmann, Anja von der Linden, Gabriella De Lucia, Anna Gallazzi, Fabio Fontanot, Yicheng Guo, Daniel McIntosh, and Xi Kang.
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Weinmann, S.M., van den Bosch, F.C., Pasquali, A. (2011). The Dependence of Low Redshift Galaxy Properties on Environment. In: Ferreras, I., Pasquali, A. (eds) Environment and the Formation of Galaxies: 30 years later. Astrophysics and Space Science Proceedings. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-20285-8_5
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DOI: https://doi.org/10.1007/978-3-642-20285-8_5
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