The Broadband Spectral Variability of MCG-6-30-15 Observed by NUSTAR and XMM-NEWTON

Research output: Contribution to journalJournal article – Annual report year: 2014Researchpeer-review

  • Author: Marinucci, A.

    Università Roma Tre

  • Author: Matt, G.

    Università Roma Tre

  • Author: Miniutti, G.

    Centro de Astrobiología

  • Author: Guainazzi, M.

    European Space Astronomy Centre and European Space Agency

  • Author: Parker, M. L.

    University of Cambridge

  • Author: Brenneman, L.

    Harvard-Smithsonian Center for Astrophysics

  • Author: Fabian, A. C.

    University of Cambridge

  • Author: Kara, E.

    University of Cambridge

  • Author: Arevalo, P.

    Pontifícia Universidade Católica

  • Author: Ballantyne, D. R.

    Georgia Institute of Technology

  • Author: Boggs, S. E.

    University of California

  • Author: Cappi, M.

    National Institute for Astrophysics

  • Author: Christensen, Finn Erland

    Astrophysics, National Space Institute, Technical University of Denmark, Elektrovej, 2800, Kgs. Lyngby, Denmark

  • Author: Craig, W.

    Columbia University

  • Author: Elvis, M.

    Harvard-Smithsonian Center for Astrophysics

  • Author: Hailey, C. J.

    Columbia University

  • Author: Harrison, F. A.

    California Institute of Technology

  • Author: Reynolds, C. S.

    University of Maryland, College Park

  • Author: Risaliti, G.

    Harvard-Smithsonian Center for Astrophysics

  • Author: Stern, D. K.

    California Institute of Technology

  • Author: Walton, D. J.

    Columbia University

  • Author: Zhang, W.

    NASA Goddard Space Flight Center

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MCG-6-30-15, at a distance of 37 Mpc (z = 0.008), is the archetypical Seyfert 1 galaxy showing very broad Fe K alpha 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 alpha 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 alpha 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 broad-line region clouds crossing the line of sight.
Original languageEnglish
Article number83
JournalAstrophysical Journal
Volume787
Issue number1
Number of pages17
ISSN0004-637X
DOIs
Publication statusPublished - 2014

Bibliographical note

© 2014. The American Astronomical Society. All rights reserved. Printed in the U.S.A.

CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • ASTRONOMY, ACTIVE GALACTIC NUCLEI, 1 GALAXY MCG-6-30-15, X-RAY-SPECTRUM, K-ALPHA LINE, PHOTON IMAGING CAMERA, DUSTY WARM ABSORBER, BLACK-HOLE, IRON LINE, SEYFERT-1 GALAXIES, REFLECTION MODEL, accretion, accretion disks, galaxies: active, galaxies: Seyfert, X-rays: individual (MCG-6-30-015)

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