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Strong gravity effects: X-ray spectra, variability and polarimetry

Published online by Cambridge University Press:  01 August 2006

Andrew C. Fabian
Andrew C. Fabian*
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK email: [email protected]
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Abstract

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Accreting black holes often show iron line emission in their X-ray spectra. When this line emission is very broad or variable then it is likely to originate from close to the black hole. The theory and observations of such broad and variable iron lines are briefly reviewed here. In order for a clear broad line to be found, one or more of the following have to occur: high iron abundance, dense disk surface and minimal complex absorption.

Several excellent examples are found from observations of Seyfert galaxies and Galactic Black Holes. In some cases there is strong evidence that the black hole is rapidly spinning. Further examples are expected as more long observations are made with XMM-Newton, Chandra and Suzaku. The X-ray spectra show evidence for the strong gravitational redshifts and light bending expected around black holes.

Keywords

Black hole physics – X-rays – line: formation – 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. 129 - 138
Copyright
Copyright © International Astronomical Union 2007

References

Beckwith, K. & Done, C. 2004, MNRAS, 352, 353CrossRefGoogle Scholar
Boller, Th. et al. 2002, MNRAS, 329, L1CrossRefGoogle Scholar
Brennemann, L. & Reynolds, C. S. 2006, ApJ 652, 1028CrossRefGoogle Scholar
Brusa, M., Gilli, R. & Comastri, A. 2005, ApJ, 621, L5CrossRefGoogle Scholar
Crummy, J., Fabian, A. C., Gallo, L. & Ross, R. R. 2006, MNRAS, 365, 1067CrossRefGoogle Scholar
Dabrowski, Y., Fabian, A. C., Iwasawa, K., Lasenby, A. N. & Rynolds, C. S. 1997, MNRAS, 288, L11CrossRefGoogle Scholar
Dovčiak, M.Karas, V. & Yaqoob, T. 2004, ApJSS, 153, 205CrossRefGoogle Scholar
Dovčiak, M.Karas, V. & Matt, G. 2004, MNRAS, 355, 1005CrossRefGoogle Scholar
Fabian, A. C., Rees, M. J., Stella, L. & White, N. E. 1989, MNRAS, 238, 729CrossRefGoogle Scholar
Fabian, A. C., Iwasawa, K., Reynolds, C. S. & Young, A. J. 2000, PASP, 112, 1145CrossRefGoogle Scholar
Fabian, A. C. et al. 2002a, MNRAS, 335, L1CrossRefGoogle Scholar
Fabian, A. C., Ballantyne, D. R., Merloni, A., Vaughan, S., Iwasawa, K. & Boller, Th. 2002b, MNRAS, 331, L35CrossRefGoogle Scholar
Fabian, A. C. & Vaughan, S. 2003, MNRAS, 340, L28CrossRefGoogle Scholar
Fabian, A. C., Miniutti, G., Gallo, L., Boller, Th., Tanaka, Y.Vaughan, S. & Ross, R. R. 2004, MNRAS, 353, 1071CrossRefGoogle Scholar
Fabian, A. C., Miniutti, G., Iwasawa, K. & Ross, R. R. 2005, MNRAS, 361, 795CrossRefGoogle Scholar
Gierliński, M., Done, C. 2004, MNRAS, 349, L7CrossRefGoogle Scholar
Guainazzi, M. et al. 1999, A&A, 341, L27Google Scholar
Guainazzi, M. et al. 2006, AN, 327, 1032 (artro-ph/0610151)CrossRefGoogle Scholar
Krolik, J. H. & Hawley, J. F. 2002, ApJ, 573, 754CrossRefGoogle Scholar
Laor, A. 1991, ApJ, 376, 90CrossRefGoogle Scholar
Marconi, A. et al. 2005, MNRAS, 351, 169CrossRefGoogle Scholar
Martocchia, A., Matt, G. & Karas, V. 2002a, A&A, 383, L23Google Scholar
Martocchia, A., Matt, G., Karas, V., Belloni, T. & Feroci, M. 2002b, A&A, 387, 215CrossRefGoogle Scholar
Miller, J. M. et al. 2002a, ApJ, 570, L69CrossRefGoogle Scholar
Miller, J. M. et al. 2002b, ApJ, 577, L15CrossRefGoogle Scholar
Miller, J. M. et al. 2002c, ApJ, 578, 348CrossRefGoogle Scholar
Miller, J. M. et al. 2003a, MNRAS, 338, 7CrossRefGoogle Scholar
Miller, J. M. et al. 2004a, ApJ, 601, 450CrossRefGoogle Scholar
Miller, J. M. et al. 2004b, ApJ, 606, L131CrossRefGoogle Scholar
Miller, J. M., Fabian, A. C., Nowak, M. A. & Lewin, W. H. G. 2003b, Proc. of the 10th Marcel Grossman Meeting, astro-ph/0402101Google Scholar
Miniutti, G., Fabian, A. C., Goyder, R. & Lasenby, A. N. 2003, MNRAS, 344, L22CrossRefGoogle Scholar
Miniutti, G. & Fabian, A. C. 2004, MNRAS, 349, 1435CrossRefGoogle Scholar
Miniutti, G., Fabian, A. C. & Miller, J. M. 2004, MNRAS, 351, 466CrossRefGoogle Scholar
Miniutti, G. et al. 2006, PASJ, 59, S315 (astro-ph/0609521)CrossRefGoogle Scholar
Nandra, K., George, I. M., Mushotzky, R. F., Turner, T. J. & Yaqoob, T. 1997a, ApJ, 476, 70CrossRefGoogle Scholar
Nandra, K. et al. 2006, AN, 327, 1039 (astro-ph/0610585)Google Scholar
Ponti, G. et al. 2006, MNRAS, 282, L53Google Scholar
Rees, M. J. 1975, MNRAS, 171 457CrossRefGoogle Scholar
Reeves, J. et al. 2006, PASJ, 59, S301 (astro-ph/0610434)CrossRefGoogle Scholar
Reynolds, C. S. & Begelman, M. C. 1997, ApJ, 488, 109CrossRefGoogle Scholar
Reynolds, C. S. & Nowak, M. A. 2003, PhR, 377, 389Google Scholar
Ross, R. R. & Fabian, A. C. 2005, MNRAS, 358, 211CrossRefGoogle Scholar
Rossi, S., Homan, J., Miller, J. M. & Belloni, T. 2005, MNRAS, 360, 763CrossRefGoogle Scholar
Soltan, A. 1982, MNRAS, 200, 115CrossRefGoogle Scholar
Stark, R. F. & Connors, P. A. 1977, Nature, 266, 429CrossRefGoogle Scholar
Streblyanska, A., Hasinger, G., Finoguenov, A., Barcons, X., Mateos, S. & Fabian, A. C. 2005, A&A, 432, 395Google Scholar
Strohmayer, T. 2001, ApJ, 552, L49CrossRefGoogle Scholar
Tanaka, Y. et al. 1995, Nature, 375, 659CrossRefGoogle Scholar
Uttley, P. & McHardy, I. M. 2004, Progr. Th. Phys. S155, 170CrossRefGoogle Scholar
Vaughan, S. & Fabian, A. C. 2004, MNRAS, 348, 1415CrossRefGoogle Scholar
Vaughan, S., Iwasawa, K., Fabian, A. C. & Hayashida, K. 2004, MNRAS, 356, 524CrossRefGoogle Scholar
Young, A. J., Lee, J. C., Fabian, A. C., Reynolds, C. S., Gibson, R. R. & Canizares, C. R. 2005, ApJ, 631, 733CrossRefGoogle Scholar
Yu, Q. & Tremaine, S. 2002, MNRAS, 335, 965CrossRefGoogle Scholar