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Fe K line profile in PG quasars: the averaged shape and Eddington ratio dependence

Published online by Cambridge University Press:  01 August 2006

H. Inoue ,
Y. Terashima  and
L. C. Ho
H. Inoue
Affiliation:
Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara 229-8510, Japan
Y. Terashima
Affiliation:
Ehime Univesity, 2-5 Bunkyo, Matsuyama 790-8577, Japan
L. C. Ho
Affiliation:
The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, CA 91101-1292, Pasadena
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Abstract

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Fe K emission line is a powerful probe of the inner part of an accretion disk. We analyze X-ray spectra of 43 Palomar-Green (PG) quasars taken from Boroson & Green (1992) observed with XMM-Newton and make an averaged Fe K line profile. We study the Eddington ratio dependence of the Fe K line profile. The width of the Fe line becomes broader (σ=0.1 to 0.7 keV) and its peak energy becomes higher (6.4 to 6.8 keV) as the Eddington ratio gets larger.

These results indicate that the physical state of the accretion disk, such as the geometrical structure and/or ionization state, changes with the Eddington ratio.

Keywords

Quasars – X-rays – accretionaccretion disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 385 - 386
Copyright
Copyright © International Astronomical Union 2007

References

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