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Spectroscopic signatures of galaxy evolution in C10024 + 16 at z~0.4

Moran, Sean M. and Ellis, Richard S. and Treu, Tommaso (2004) Spectroscopic signatures of galaxy evolution in C10024 + 16 at z~0.4. In: Outskirts of galaxy clusters : intense life in the suburbs. IAU Symposium and Colloquium Proceedings Series. No.195. Cambridge University Press , Cambridge, pp. 384-389. ISBN 052184908X .

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We report the first results from a panoramic spectroscopic survey of galaxies in the rich cluster Cl0024+1654 (z ≃ 0.4). Using HST imaging we examine the properties of early-types as a function of cluster radius. At all cluster radii, our sample lies on a selfconsistent Fundamental Plane whose zero point implies evolution since z = 0 corresponding to Δ[log(M/L_V )] = 0.14 ± 0.06, an overall trend consistent with previous work. Using diagnostic [O II] emission and Balmer absorption lines, we locate a population of intrinsically faint galaxies at 1–2.4 Mpc radius undergoing a period of star formation. The luminosity-dependent radial trends are suggestive of the gradual quenching of star formation for infalling galaxies. We discuss physical mechanisms that may be responsible for this environmental evolution.

Item Type:Book Section
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Ellis, Richard S.0000-0001-7782-7071
Treu, Tommaso0000-0002-8460-0390
Additional Information:© 2004 International Astronomical Union. Published online: 06 October 2004.
Record Number:CaltechAUTHORS:20111014-112847663
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Official Citation:Spectroscopic signatures of galaxy evolution in C10024 + 16 at z~0.4. Sean M. Moran, Richard S. Ellis and Tommaso Treu Proceedings of the International Astronomical Union. Volume 2004, Issue IAUC195, pp 384 - 389 2004 International Astronomical Union Published online: 06 October 2004 DOI:10.1017/S174392130400081X
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27231
Deposited By: Ruth Sustaita
Deposited On:18 Oct 2011 14:45
Last Modified:05 Oct 2017 22:40

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