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Julia Scharwaechter |
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"Case studies of QSO host
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The interplay between galaxy mergers, starburst activity, and nuclear activity in QSO host galaxies plays a key role in the controversy about a possible evolutionary link between ultra-luminous infrared galaxies (ULIRGs) and QSOs. In this talk I will present our case studies of I Zw 1, 3C 48, and of a small sample of QSOs from the Sloan Digital Sky Survey (SDSS). I Zw 1 and 3C 48 are two popular candidates for a possible transition stage in a ULIRG-to-QSO evolution. Their merger properties will be summarized based on results from optical, near-infrared, and millimeter observations and from numerical multi-particle simulations. A particular focus of the talk will be on recent results for one of the SDSS QSOs. High-angular resolution imaging of this major-merger candidate gives evidence for a double luminosity peak in the central region. |