Статья

THE BROADBAND SPECTRAL VARIABILITY OF MCG–6-30-15 OBSERVED BY<i>NUSTAR</i>AND<i>XMM-NEWTON</i>

Andrea MarinucciCentro de Astrobiología (CSIC-INTA), Dep. de AstrofisicaG. MattDipartimento di Matematica e Fisica, Università degli Studi Roma Tre, via della Vasca Navale 84, I-00146 Roma, ItalyG. MiniuttiESAC, P.O. Box 78, Villanueva de la Cañada, Madrid, SpainM. GuainazziEuropean Space Astronomy Center of ESA, Apartado 50727, E-28080 Madrid, SpainM. L. ParkerInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 OHA, UKLaura BrennemanHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USAA. C. FabianInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 OHA, UKErin KaraInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 OHA, UKP. ArevaloPontificia Universidad Católica de Chile, Instituto de Astrofísica, Casilla 306, Santiago 22, ChileD. R. BallantyneCenter for Relativistic Astrophysics, School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USASteven E. BoggsSpace Sciences Laboratory, University of California, Berkeley, 7 Gauss Way, Berkeley, CA 94720-7450, USAM. CappiINAF, IASF Bologna, Via P Gobetti 101, I-40129 Bologna, ItalyFinn E. ChristensenDanish Technical University, DK-2800 Lyngby, DenmarkWilliam W. CraigLawrence Livermore National Laboratory, Livermore, CA, USAM. ElvisHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USACharles J. HaileyColumbia University, New York, NY 10027, USAFiona A. HarrisonCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USAC. S. ReynoldsDepartment of Astronomy, University of Maryland, College Park, MD 20742-2421, USAG. RisalitiHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USADaniel SternJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USAD. J. WaltonColumbia University, New York, NY 10027, USAW. ZhangNASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

2014en

ABI

Аннотация

MCG-6-30-15, at a distance of 37 Mpc (z=0.008), is the archetypical Seyfert 1 galaxy showing very broad Fe K$α$ emission. We present results from a joint NuSTAR and XMM-Newton observational campaign that, for the first time, allows a sensitive, time-resolved spectral analysis from 0.35 keV up to 80 keV. The strong variability of the source is best explained in terms of intrinsic X-ray flux variations and in the context of the light bending model: the primary, variable emission is reprocessed by the accretion disk, which produces secondary, less variable, reflected emission. The broad Fe K$α$ profile is, as usual for this source, well explained by relativistic effects occurring in the innermost regions of the accretion disk around a rapidly rotating black hole. We also discuss the alternative model in which the broadening of the Fe K$α$ is due to the complex nature of the circumnuclear absorbing structure. Even if this model cannot be ruled out, it is disfavored on statistical grounds. We also detected an occultation event likely caused by BLR clouds crossing the line of sight.

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Идентификаторы

DOI: 10.1088/0004-637x/787/1/83

Цитирования и источники

Цитирований: 5Использованных источников: 0

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