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Influence of AGN on the properties of galaxies during the (U)LIRG phase

Published online by Cambridge University Press:  21 March 2013

Ming-Yi Lin ,
Sébastien Foucaud  and
Yasuhiro Hashimoto
Ming-Yi Lin
Affiliation:
Department of Earth Sciences, National Taiwan Normal University, No.88, Sec. 4, Tingzhou Rd., Wenshan District, Taipei 11677, Taiwan R.O.C. e-mail: acdo2002@gmail.com
Sébastien Foucaud
Affiliation:
Department of Earth Sciences, National Taiwan Normal University, No.88, Sec. 4, Tingzhou Rd., Wenshan District, Taipei 11677, Taiwan R.O.C. e-mail: acdo2002@gmail.com
Yasuhiro Hashimoto
Affiliation:
Department of Earth Sciences, National Taiwan Normal University, No.88, Sec. 4, Tingzhou Rd., Wenshan District, Taipei 11677, Taiwan R.O.C. e-mail: acdo2002@gmail.com
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Abstract

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Merging, resulting from galaxy interaction and collision, is one essential scenario to interpret the distinct evolutionary stages of galaxy formation. However AGNs are believed to play an essential role towards the final stages of this scenario, in particular to clear the galaxy from a large excess of dust. Selecting galaxies with both 70μm and X-ray detection will help to understand the relation between star formation and AGN. We are taking advantage of the extensive multi-wavelength coverage of the Cosmic Evolution Survey (COSMOS) field to dissect the AGN influence on infrared luminous objects. We demonstrate that enhanced star formation is more probably responsible for additional obscuration of the central AGN than the dust torus, in agreement with current galaxy formation theory. Furthermore, we demonstrate that the presence of an AGN does not increase the galaxy dust temperature significantly.

Keywords

infrared: galaxies — galaxies: active — galaxies: high-redshift
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 193
Copyright
Copyright © International Astronomical Union 2013

References

Hopkins, P. F., Hernquist, L., Cox, T. J., & Kereš, D. 2008, ApJS, 175, 356CrossRefGoogle Scholar