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I Zwicky 1: Decomposition and dynamics of the nearby QSO host |
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| Authors: | Julia Scharwächter Andreas Eckart Susanne Pfalzner Johannes Staguhn Eva Schinnerer |
| Institution: | 1. I. Physikalisches Institut, Universit?t zu K?ln, Zülpicher Str. 77, 50937, K?ln, Germany 2. NASA Goddard Space Flight Center, Code 685, Greenbelt, MD, 20771, USA 3. Department of Astronomy, MS 105-24, California Institute of Technology, Pasadena, CA, 91125, USA |
| Abstract: | We address current theories of research on morphology, environment and evolution of active galaxies in the form of a detailed case study of the nearby QSO host I Zw 1. This study is based on sub-kpc resolution 12CO(1-0) observations with the BIMA mm-interferometer and on near-infrared imaging with ISAAC at the VLT. The 12CO(1-0) maps reveal a circumnuclear molecular gas ring with a radius of 0.9 kpc. The imaging data in the J-band are analyzed with respect to a disk-bulge decomposition. Together with a model of the gas rotation curve, the radial profile of the dynamical J-band mass-to-light ratio (M/L) is discussed. The J-band images give new evidence for an interaction between I Zw 1 and its nearby companion. First results from a sequence of N-body simulations for an extensive test of the parameter space of the interaction are presented. This revised version was published online in August 2006 with corrections to the Cover Date. |
| Keywords: | Galaxies: QSO hosts individual (I Zw 1) starburst Near-infrared: decomposition |
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