The origin and physical mechanism of the ensemble Baldwin effect

Details The origin and physical mechanism of the ensemble Baldwin effect The origin and physical mechanism of the ensemble Baldwin effect

2009-03-04

arxiv.org/abs/0903.0698v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

to appear in the proceedings of "The Starburst-AGN Connection Conference",ASP Conference Series. Ver2: An appendix of ``Not Ba

Scientific paper

We have conducted a systematic investigation of the origin and underlying physics of the line--line and line--continuum correlations of AGNs, particularly the Baldwin effect. Based on the homogeneous sample of Seyfert 1s and QSOs in the SDSS DR4, we find the origin of all the emission-line regularities is Eddington ratio (L/Ledd). The essential physics is that L/Ledd regulates the distributions of the properties (particularly column density) of the clouds bound in the line-emitting region.

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