AAS 205th Meeting, 9-13 January 2005
Session 118 Activity in the Nuclei of Galaxies
Oral, Wednesday, January 12, 2005, 10:00-11:30am, California

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[118.01] Keck Laser Illuminates AGN in the Distant Universe.

J, Melbourne (UCSC), S. Wright (UCLA), D. Le Mignant (WMKO), M. Barczys, J. Larkin (UCLA), C. Max, D. Koo (UCSC)

The Center for Adaptive Optics Treasury Survey (CATS) aims to combine deep HST images in the optical with deep Keck adaptive optics (AO) data in the near-infrared (NIR) to study distant galaxies, AGN, and supernovae. We recently achieved an important new milestone by securing the first high quality Keck laser guide star (LGS) AO image of faint galaxies. Six galaxies with redshifts ranging from 0.3-1.0 were targeted in one pointing in the GOODS-S field. Two are Chandra sources with complex morphologies suggestive of recent merger activity. Substructures seen in the NIR AO image, including the double nucleus of one Chandra source and multiple tight knots in another, are confirmed in the optical HST images (both about 0.1" FWHM) but are undetected in very deep, ground-based NIR images from ESO with seeing about 0.5" FWHM. We will present results on the stellar populations of the substructures as derived from photometry of the galaxy subcomponents using the NIR AO data and the optical HST data taken with four ACS filters.

If you would like more information about this abstract, please follow the link to www.ucolick.org/~jmel/cats.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: jmel@ucolick.org

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© 2004. The American Astronomical Society.