AAS 201st Meeting, January, 2003
Session 112. The ISM: Clouds and Regions
Poster, Thursday, January 9, 2003, 9:20am-4:00pm, Exhibit Hall AB

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[112.05] Interferometric Observations of Molecular Clouds in the Host Galaxy of the QSO I Zw 1

J.G. Staguhn (University of Maryland, College Park; NASA/GSFC), A. Eckart (University of Cologne, Germany), E. Schinnerer (Caltech; NRAO, Socorro), P.J. Teuben (University of Maryland, College Park)

We present sub-arcsecond resolution BIMA* 12CO(1-0) and PdBI 12CO(2-1) observations of the nearby QSO I Zw 1. The 12CO(1-0) observations show the presence of a ring-like circumnuclear structure at a distance of ~ 1 kpc from the center of the host galaxy. These molecular clouds are likely the site of a circumnuclear starburst which is indicated by NIR observations. The 12CO(2-1) observations show emission, which is more centrally peaked, and the ring-like structure is not evident in these observations. This can be explained by different excitation conditions in the nuclear region. The observations allow a first insight into the physics of molecular clouds in the host galaxy of a QSO at a sub-kpc scale.

*The BIMA observatory is funded through NSF grant AST-9981289

The author(s) of this abstract have provided an email address for comments about the abstract: staguhn@gsfc.nasa.gov

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