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High resolution SMA imaging of (ultra)-luminous infrared galaxies

Published online by Cambridge University Press:  17 August 2012

Qinghua Tan ,
Yu Gao ,
Zhong Wang  and
Vivian U
Qinghua Tan
Affiliation:
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China Graduate School of CAS, Beijing 100039, China
Yu Gao
Affiliation:
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China
Zhong Wang
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA02138, USA
Vivian U
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA02138, USA Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
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Abstract

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We present preliminary results on Submillimeter Array (SMA) observations of three Luminous Infrared Galaxies (LIRGs) and one infrared Quasi Stellar Object (IR QSO). The galaxies were observed at sub-kpc spatial resolution in lines of CO and 13CO, as well as in the continuum at 1.3mm. The moment maps show that the molecular gas in these galaxies is distributed in rotating disks with velocity gradients ranging from ~30 to 120 km s−1 kpc−1. Combined with archival CO J=3-2 data, the spatial distributions of the CO J=3-2/J=2-1 ratios shows clear variations across the galaxies. The brightness temperature of the overlap region in VV 114 is found to be lower than that in the nuclear region of VV 114E, suggesting that that the bulk of molecular gas in this region is sub-thermalized.

Keywords

galaxies: individual (VV114NGC 1614IRAS 17578-0400IRAS F22454-1744) - galaxies: interactions - galaxies: starburst
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 471 - 474
Copyright
Copyright © International Astronomical Union 2012

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