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Sizes of Passively Evolving Galaxies at z ~2 in CLASH

Published online by Cambridge University Press:  17 July 2013

Lulu Fan ,
Yang Chen ,
Xinzhong Er ,
Lin Lin  and
Jinrong Li
Lulu Fan
Affiliation:
Center for Astrophysics, USTC, 230026 Hefei, China Key Lab. for Research in Galaxies and Cosmology, USTC, CAS, 230026 Hefei, China
Yang Chen
Affiliation:
Center for Astrophysics, USTC, 230026 Hefei, China Astrophysics Sector, SISSA, Via Bonomea 265, 34136 Trieste, Italy
Xinzhong Er
Affiliation:
National Astronomical Observatories, CAS, Beijing 100012, China
Lin Lin
Affiliation:
Center for Astrophysics, USTC, 230026 Hefei, China
Jinrong Li
Affiliation:
Center for Astrophysics, USTC, 230026 Hefei, China
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Abstract

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We select ten passively evolving and massive galaxies at redshift z ~ 2 from the Cluster Lensing And Supernova survey with Hubble (CLASH). We derive the stellar properties of these galaxies using the multiwavelength HST WFC3 and ACS data, together with Spitzer IRAC observations. We also analyze the optical rest-frame morphology of these high redshift objects by using the GALFIT package (Peng et al. 2002). The observed near-IR images, obtained with the HST/WFC3 camera with high spatial resolution and amplified by the foreground clusters, provide us with a good chance to study the structures of such systems. Six out of ten galaxies have on average a four times smaller effective radius, in agreement with previous works at redshift z ~ 2.

Keywords

galaxies: evolutiongalaxies: formationgalaxies: high-redshift
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S295: The intriguing life of massive galaxies , August 2012 , pp. 57
Copyright
Copyright © International Astronomical Union 2013 

References

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