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Title:
Soft X-ray emission lines from a relativistic accretion disk in MCG -6-30-15 and Mrk 766
Authors:
Branduardi-Raymont, G.; Sako, M.; Kahn, S. M.; Brinkman, A. C.; Kaastra, J. S.; Page, M. J.
Affiliation:
AA(Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK), AB(Department of Physics and Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027, USA), AC(Department of Physics and Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027, USA), AD(Space Research Organisation of The Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands } observations of MCG -6-30-15 and Mrk 766), AE(Space Research Organisation of The Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands } observations of MCG -6-30-15 and Mrk 766), AF(Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK)
Publication:
Astronomy and Astrophysics, v.365, p.L140-L145 (2001) (A&A Homepage)
Publication Date:
01/2001
Origin:
EDP Sciences
A&A Keywords:
BLACK HOLE PHYSICS, ACCRETION, ACCRETION DISKS, LINE: FORMATION, GALAXIES: INDIVIDUAL: MCG -6-30-15, GALAXIES: INDIVIDUAL: MRK 766, X-RAYS: GALAXIES
DOI:
10.1051/0004-6361:20000209
Bibliographic Code:
2001A&A...365L.140B

Abstract

XMM-Newton Reflection Grating Spectrometer (RGS) spectra of the Narrow Line Seyfert 1 galaxies MCG -6-30-15 and Mrk 766 are physically and spectroscopically inconsistent with standard models comprising a power-law continuum absorbed by either cold or ionized matter. We propose that the remarkably similar features detected in both objects in the 5-35 Å band are H-like oxygen, nitrogen, and carbon emission lines, gravitationally redshifted and broadened by relativistic effects in the vicinity of a Kerr black hole. We discuss the implications of our interpretation, and demonstrate that the derived parameters can be physically self-consistent. Based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).
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