Vulcani, Benedetta and Poggianti, Bianca M. and Fasano, Giovanni and Desai, Vandana and Dressler, Alan and Oemler, August, Jr. and Calvi, Rosa and D'Onofrio, Mauro and Moretti, Alessia (2012) The importance of the local density in shaping the galaxy stellar mass functions. Monthly Notices of the Royal Astronomical Society, 420 (2). pp. 1481-1494. ISSN 0035-8711 http://resolver.caltech.edu/CaltechAUTHORS:20120224-154439407
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Exploiting the capabilities of four different surveys – the Padova–Millennium Galaxy and Group Catalogue (PM2GC), the WIde-field Nearby Galaxy-cluster Survey (WINGS), the IMACS (Inamori-Magellan Areal Camera and Spectrograph) Cluster Building Survey (ICBS) and the ESO (European Southern Observatory) Distant Cluster Survey (EDisCS) – we analyse the galaxy stellarmass distribution as a function of local density in mass-limited samples, in the field and in clusters from low (z ≥ 0.04) to high (z ≤ 0.8) redshift. We find that at all redshifts and in all environments, local density plays a role in shaping themass distribution. In the field, it regulates the shape of the mass function at any mass above the mass limits. In clusters, it seems to be important only at low masses (log M_∗/M_☉ ≤ 10.1 in WINGS and log M_∗/M_☉ ≤ 10.4 in EDisCS), otherwise it seems not to influence the mass distribution. Putting together our results with those of Calvi et al. and Vulcani et al. for the global environment, we argue that at least at z ≤ 0.8 local density is more important than global environment in determining the galaxy stellar mass distribution, suggesting that galaxy properties are not much dependent on halo mass, but do depend on local scale processes.
|Additional Information:||© 2011 The Authors. Monthly Notices of the Royal Astronomical Society © 2011 RAS. Accepted 2011 November 3. Received 2011 November 3; in original form 2011 July 26. Article first published online: 30 Dec 2011. This paper includes data gathered with the 6.5-m Magellan Telescopes located at Las Campanas Observatory, Chile. We thank the referee for useful comments. We would like to thank the whole WINGS team for stimulating discussions. We would also like to thank Alfonso Aragόn-Salamanca and Gabriella De Lucia, whose suggestions helped us to improve the paper. BV and BMP acknowledge financial support from ASI contract I/016/07/0 and ASI-INAF I/009/10/0. BV also acknowledges financial support from the Fondazione Ing. Aldo Gini|
|Subject Keywords:||galaxies: clusters: general; galaxies: evolution; galaxies: formation; galaxies: fundamental parameters; galaxies: luminosity function, mass function|
|Official Citation:||Vulcani, B., Poggianti, B. M., Fasano, G., Desai, V., Dressler, A., Oemler, A., Calvi, R., D’Onofrio, M. and Moretti, A. (2012), The importance of the local density in shaping the galaxy stellar mass functions. Monthly Notices of the Royal Astronomical Society, 420: 1481–1494. doi: 10.1111/j.1365-2966.2011.20135.x|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||27 Feb 2012 16:49|
|Last Modified:||27 Feb 2012 16:49|
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