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Linking star formation and environment in supercluster galaxies

Published online by Cambridge University Press:  06 October 2004

M. E. Gray ,
C. Wolf ,
K. Meisenheimer ,
A. Taylor ,
S. Dye ,
A. Borch  and
M. Kleinheinrich
M. E. Gray
Affiliation:
School of Physics and Astronomy, University of Nottingham, Nottingham NG7 1GW, UK email: [email protected]
C. Wolf
Affiliation:
Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK
K. Meisenheimer
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
A. Taylor
Affiliation:
Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ
S. Dye
Affiliation:
Astrophysics Group, Blackett Lab, Imperial College, Prince Consort Road, London SW7 2BW
A. Borch
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
M. Kleinheinrich
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
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Abstract

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We present a unique multiwavelength dataset of the Abell 901/902 supercluster at $z=0.16$. The environment of the structure is well characterized by weak lensing analysis, galaxy dynamics, and X-ray imaging, and we examine how galaxy properties correlate with these measures of environment. We examine the star-formation–density relation and find a surface mass density threshold above which star-formation in supercluster galaxies is truncated, and that this transformation affects primarily the faint end of the star-forming galaxy population (down to $M^*+6$). In addition, we present a preliminary dynamical analysis of the spectroscopic sample ($n\sim 300$ galaxies), revealing a bimodal distribution of galaxy velocities and significant substructure.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC195 , March 2004 , pp. 390 - 393
Copyright
© 2004 International Astronomical Union