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A Search for Molecular Gas in GHz-peaked Spectrum Radio Sources

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Christopher P. O'Dea1, Jack Gallimore2, Carlo Stanghellini3, Stefi A. Baum4 and James M. Jackson5

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We present searches for molecular gas (CO, OH, CS, and NH3) in six gigahertz-peaked spectrum (GPS) radio sources. We do not detect gas in any source and place upper limits on the mass of molecular gas that are generally in the range from ~109 to a few times 1010 Modot. These limits are consistent with the following interpretations: (1) GPS sources do not require very dense gas in their hosts, and (2) the GPS sources are unlikely to be confined by dense gas and will evolve to become larger radio sources.


Keywords

galaxies: active; galaxies: ISM; radio lines: galaxies


Dates

Issue 2 (2005 February)

Received 2004 August 17, accepted for publication 2004 October 26



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