The relationship between X-ray emission and accretion in X-ray selected AGNs. (arXiv:1212.5693v1 [astro-ph.HE])

The relationship between X-ray emission and accretion in X-ray selected AGNs. (arXiv:1212.5693v1 [astro-ph.HE]):
We study the link between the X-ray emission in radio-quiet AGNs and the
accretion rate on the central Supermassive Black-Hole (SMBH) using a
well-defined and statistically complete sample of 70 type1 AGNs extracted from
the XMM-Newton Bright Serendipitous survey (XBS). To this end, we search and
quantify the statistical correlations between the main parameters that
characterize the X-ray emission (i.e. the X-ray spectral slope and the X-ray
loudness), and the accretion rate, both absolute and relative to the Eddington
limit (Eddington ratio). Here, we summarize and discuss the main statistical
correlations found and their possible implications on current disk-corona
models.