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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 559531.0, MPI für Astronomie / Publikationen_mpia
A multiscale approach to environment
Authors:Wilman, David; Zibetti, Stefano; Budavári, Tamas; Popescu, C. C.
Language:English
Publisher:AIP
Place of Publication:Melville
Date of Publication (YYYY-MM-DD):2010
Title of Proceedings:Hunting for the Dark:The Hidden Side of Galaxy Formation
Start Page:323
End Page:326
Title of Series:AIP Conference Proceedings
Volume (in Series):1240
Name of Conference/Meeting:American Institute of Physics Conference Series
Review Status:not specified
Audience:Experts Only
Abstract / Description:Physical processes influencing the properties of galaxies can be traced by the dependence and evolution of galaxy properties on their environment. A detailed understanding of this dependence can only be gained through comparison of observations with models, with an appropriate quantification of the rich parameter space describing the environment of the galaxy. We present a new, multiscale parameterization of galaxy environment which retains an observationally motivated simplicity whilst utilizing the information present on different scales. We examine how the distribution of galaxy (u-r) colours in the Sloan Digital Sky Survey (SDSS), parameterized using a double gaussian (red plus blue peak) fit, depends upon multiscale density. This allows us to probe the detailed dependence of galaxy properties on environment in a way which is independent of the halo model. Nonetheless, cross-correlation with the group catalogue constructed by Yang et al., 2007 shows that galaxy properties trace environment on different scales in a way which mimics that expected within the halo model. This provides independent support for the existence of virialized haloes, and important additional clues to the role played by environment in the evolution of the galaxy population. This work is described in full by Wilman et al., 2010, MNRAS, in press.
Free Keywords:galaxies; dark matter; star formation; colour; Origin; formation; evolution; age; and star formation; Dark matter; Star formation; Magnitudes and colors; luminosities
Comment of the Author/Creator:Date: 2010, June 1, 2010
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISBN:978-0735407862 [ID No:1]
URL:http://adsabs.harvard.edu/abs/2010AIPC.1240..323W [ID No:2]
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