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A Herschel Spectroscopic Survey of Warm Molecular Gas in Local Infrared Luminous Galaxies

Published online by Cambridge University Press:  21 March 2013

N. Lu ,
Y. Zhao ,
C. K. Xu ,
Y. Gao  and
the GOALS FTS Team
N. Lu*
Affiliation:
NHSC/IPAC, MS 100-22, California Institute of Technology, Pasadena, CA 91125, USA
Y. Zhao
Affiliation:
NHSC/IPAC, MS 100-22, California Institute of Technology, Pasadena, CA 91125, USA Purple Mountain Observatory, Chinese Academic of Sciences, Nanjing 210008, China
C. K. Xu
Affiliation:
NHSC/IPAC, MS 100-22, California Institute of Technology, Pasadena, CA 91125, USA
Y. Gao
Affiliation:
Purple Mountain Observatory, Chinese Academic of Sciences, Nanjing 210008, China
*
*email: lu@ipac.caltech.edu
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Abstract

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We describe an on-going 194-671 μm spectroscopic survey of a flux-limited sample of 125 local luminous infrared galaxies (LIRGs) with Herschel SPIRE Fourier Transform Spectrometer (FTS). The survey targets primarily the CO spectral line energy distribution (SLED), from J = 4-3 up to J = 13-12, to probe dense and warm molecular gas that should play an intimate role in star formation and/or active galactic nuclear activities in these galaxies. The program is about 75% finished. At S/N > 5, besides the CO lines, we also detected [N ii] 205 μm and [C i] 370 μm (3P2 − 3P1) lines in every target observed. In about half of the observed targets, we also detected [C i] 609 μm (3P1 – 3P0).

Keywords

galaxies: ISM — galaxies: starburst — infrared: galaxies — infrared: ISM
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. 249
Copyright
Copyright © International Astronomical Union 2013