Keck laser guide star observations of 11 GOODS-South Chandra sources at z ~ 1
Abstract
The Center for Adaptive Optics (CfAO) Treasury Survey (CATS) has observed 11 Chandra sources (10 AGN) at z ~ 1 in the GOODS-South field with the laser guide star adaptive optics (LGSAO) system at Keck Observatory. We combine this K band imaging with ACS imaging in the B, V, I, and z bands to obtain multi-color imaging at a spatial resolution better than 100 mas in all bands. We attempt to remove central optical point sources from AGN using the GALFIT (Peng et al. 2002) routine. We fit Bruzual & Charlot (2003) tau-models to the residuals and find young, dusty stellar populations in the central 1-2 kpc (the mean central optical depth at rest-frame 500 nm is 4-5).
- Publication:
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Formation and Evolution of Galaxy Bulges
- Pub Date:
- July 2008
- DOI:
- Bibcode:
- 2008IAUS..245..463A
- Keywords:
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- instrumentation: adaptive optics;
- galaxies: active;
- galaxies: stellar content