On the Anticorrelation Between Galaxy Light Concentration and X-ray-to-Optical Flux Ratio

Details On the Anticorrelation Between Galaxy Light Concentration and X-ray-to-Optical Flux Ratio On the Anticorrelation Between Galaxy Light Concentration and X-ray-to-Optical Flux Ratio

2009-07-29

arxiv.org/abs/0907.5099v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

9 pages, 3 figures, accepted for publication in ApJ Letters

Scientific paper

Active Galactic Nuclei (AGN) play an important role in many aspects of the modern cosmology, and of particular interest is the issue of the interplay between AGN and their host galaxy. Using X-ray and optical data sets, we have explored the properties of a large sample of AGNs in the Subaru/XMM-Newton Deep Survey (SXDS) field, and studied their evolution in relation with the evolution of their host galaxy. We present here an anticorrelation between X-ray-to-optical flux ratio (X/O) and galaxy light concentration (C), which has been found for the first time and might suggest that early type galaxies, having poor matter supply to feed the AGN activity, have lower Eddington rates than those of late type galaxies.

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