Статья

THE DISK WIND IN THE RAPIDLY SPINNING STELLAR-MASS BLACK HOLE 4U 1630–472 OBSERVED WITH <i>NuSTAR</i>

Ashley L. KingDepartment of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109-1042, USA; [email protected]D. J. WaltonCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USAJ. M. MïllerDepartment of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109-1042, USA; [email protected]D. BarretCNRS, Institut de Recherche en Astrophysique et Planétologie, 9 Av. colonel Roche, BP 44346, F-31028 Toulouse cedex 4, FranceSteven E. BoggsSpace Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450, USAFinn E. ChristensenDTU Space, National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby, DenmarkWilliam W. CraigLawrence Livermore National Laboratory, Livermore, CA 94550, USAAndy FabiánInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UKFelix FürstCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USACharles J. HaileyColumbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USAFiona A. HarrisonCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USARoman KrivonosSpace Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450, USAKaya MoriColumbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USAL. NatalucciIstituto Nazionale di Astrofisica, INAF-IAPS, via del Fosso del Cavaliere, I-00133 Roma, ItalyDaniel SternJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 169-221, Pasadena, CA 91109, USAJohn A. TomsickSpace Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450, USAWilliam W. ZhangNASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

2014en

ABI

Аннотация

We present an analysis of a short NuSTAR observation of the stellar-mass black hole and low-mass X-ray binary 4U 1630$-$472. Reflection from the inner accretion disk is clearly detected for the first time in this source, owing to the sensitivity of NuSTAR. With fits to the reflection spectrum, we find evidence for a rapidly spinning black hole, $a_{*}=0.985^{+0.005}_{-0.014}$ ($1σ$ statistical errors). However, archival data show that the source has relatively low radio luminosity. Recently claimed relationships between jet power and black hole spin would predict either a lower spin or a higher peak radio luminosity. We also report the clear detection of an absorption feature at $7.03\pm0.03$ keV, likely signaling a disk wind. If this line arises in dense, moderately ionized gas ($\logξ=3.6^{+0.2}_{-0.3}$) and is dominated by He-like Fe XXV, the wind has a velocity of $v/c=0.043^{+0.002}_{-0.007}$ (12900$^{+600}_{-2100}$ km s$^{-1}$). If the line is instead associated with a more highly ionized gas ($\logξ=6.1^{+0.7}_{-0.6}$), and is dominated by Fe XXVI, evidence of a blue-shift is only marginal, after taking systematic errors into account. Our analysis suggests the ionized wind may be launched within 200$-$1100 Rg, and may be magnetically driven.

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Идентификаторы

DOI: 10.1088/2041-8205/784/1/l2

Цитирования и источники

Цитирований: 4Использованных источников: 0

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