Optical Properties of All the X-ray Sources within the GOODS HST/ACS Survey of the Chandra Deep Field South

Details Optical Properties of All the X-ray Sources within the GOODS HST/ACS Survey of the Chandra Deep Field South Optical Properties of All the X-ray Sources within the GOODS HST/ACS Survey of the Chandra Deep Field South

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.4218k&link_type=abstract

American Astronomical Society Meeting 202, #42.18; Bulletin of the American Astronomical Society, Vol. 35, p.761

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We present multi-band optical imaging from the GOODS HST/ACS treasury program of over 200 X-ray emitting sources located within the Chandra Deep Field South, consisting predominantly of active galactic nuclei (AGN) and starbursts, as well as a number of ultra-luminous X-ray sources. We describe the overall optical and X-ray properties of various populations within this sample, which include `local' galaxies (redshifts below about 0.2), as well as unobscured (Type 1) AGN and optically faint X-ray sources which are likely obscured AGN of moderate luminosity located at redshifts in the range 1 - 3. Most of these AGN are of much lower luminosity than the high-luminosity quasars that are typically observed at these redshifts; instead, their luminosities are more representative of Seyferts in the nearby universe, which have rarely been studied at distances above a few hundred Mpc. Our present sample therefore extends by factors of 20 to 100 the distances at which we can identify and study AGN of these luminosties. This, together with the exquisite sensitivity and resolution of HST/ACS, allows us for the first time to study the detailed properties of these sources during the `quasar era' at early cosmological epochs when galaxy activity was at its peak.

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