XMM-EPIC observation of MCG–6-30-15: direct evidence for the extraction of energy from a spinning black hole?期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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XMM-EPIC observation of MCG–6-30-15: direct evidence for the extraction of energy from a spinning black hole?

Authors:	Jörn Wilms Christopher S Reynolds † Mitchell C Begelman James Reeves Silvano Molendi Rüdiger Staubert Eckhard Kendziorra

Institution:	¹Institut für Astronomie und Astrophysik, Abt. Astronomie, Universität Tübingen, Sand 1, D-72076 Tübingen, Germany;²Department of Astronomy, University of Maryland, College Park, MD 20742, USA;³JILA, Campus Box 440, University of Colorado, Boulder, CO 80309, USA;⁴Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA;⁵X-Ray Astronomy Group, Department of Physics and Astronomy, Leicester University, Leicester LE1 7RH;⁶Istituto di Fisica Cosmica, CNR, via Bassini 15, I-20133 Milano, Italy

Abstract:	We present XMM-Newton European Photon Imaging Camera (EPIC) observations of the bright Seyfert 1 galaxy MCG–6-30-15, focusing on the broad Fe K α line at ～6 keV and the associated reflection continuum, which is believed to originate from the inner accretion disc. We find these reflection features to be extremely broad and redshifted, indicating an origin in the very central regions of the accretion disc. It seems likely that we have caught this source in the 'deep minimum' state first observed by Iwasawa et al. The implied central concentration of X-ray illumination is difficult to understand in any pure accretion disc model. We suggest that we are witnessing the extraction and dissipation of rotational energy from a spinning black hole by magnetic fields connecting the black hole or plunging region to the disc.

Keywords:	accretion accretion discs black hole physics galaxies: individual: MCG–6-30-15 galaxies: Seyfert X-rays: galaxies

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