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Bright radio emission from an ultraluminous stellar-mass microquasar in M 31

机译:M 31中超发光恒星质量微类星体发出的明亮无线电发射

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摘要

A subset of ultraluminous X-ray sources (those with luminosities of less than 10~(40) erg s~-1; ref. 1) are thought to be powered by the accretion of gas onto black holes with masses of ~5-20M_☉, probably by means of an accretion disk. The X-ray and radio emission are coupled in such Galactic sources; the radio emission originates in a relativistic jet thought to be launched from the innermost regions near the black hole, with the most powerful emission occurring when the rate of infalling matter approaches a theoretical maximum (the Eddington limit). Only four such maximal sources are known in the Milky Way, and the absorption of soft X-rays in the interstellar medium hinders the determination of the causal sequence of events that leads to the ejection of the jet. Here we report radio and X-ray observations of a bright new X-ray source in the nearby galaxy M 31, whose peak luminosity exceeded 10~(39)ergs(-1). The radio luminosity is extremely high and shows variability on a timescale of tens of minutes, arguing that the source is highly compact and powered by accretion close to the Eddington limit onto a black hole of stellar mass. Continued radio and X-ray monitoring of such sources should reveal the causal relationship between the accretion flow and the powerful jet emission.
机译:认为超发光X射线源的子集(其发光度小于10〜(40)erg s〜-1;参考文献1)由气体在质量为〜5-20M_的黑洞上积聚提供动力。 ☉,可能是借助吸积盘。 X射线和无线电发射在这类银河源中耦合;无线电发射起源于相对论性射流,认为是从黑洞附近的最内层区域发射的,而最强发射发生在落入物质的速率接近理论最大值(爱丁顿极限)时。在银河系中,只有四个这样的最大辐射源是已知的,星际介质中软X射线的吸收阻碍了导致射流喷射的事件的因果顺序的确定。在这里,我们报告了附近星系M 31中明亮的新X射线源的无线电和X射线观察,该星系的峰值光度超过10〜(39)ergs(-1)。射电的光度极高,并且在数十分钟的时间尺度上显示出可变性,理由是源极紧凑,并通过在接近恒星质量黑洞上的埃丁顿极限附近积聚来提供动力。继续对此类源进行无线电和X射线监测,应揭示积聚流量与强射流之间的因果关系。

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  • 来源
    《Nature》 |2013年第7431期|187-190|共4页
  • 作者单位

    Physics Department, University of Durham, Durham DH13LE, UK.,Astronomical Institute Anton Pannekoek, Science Park 904,1098 XH Amsterdam, The Netherlands;

    International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;

    Astronomical Institute Anton Pannekoek, Science Park 904,1098 XH Amsterdam, The Netherlands;

    School of Physics and Astronomy, University of Southampton, Southampton SOI 7 1BJ, UK;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;

    School of Physics and Astronomy, University of Southampton, Southampton SOI 7 1BJ, UK;

    Physics Department, University of Durham, Durham DH13LE, UK;

    Institute of Astronomy, Cambridge University, Madingley Road, Cambridge CB3 OHA, UK.,Astronomy Department, California Institute of Technology, MC 249-17,1200 East California Boulevard, Pasadena, California 91125, USA;

    Astronomy Department, California Institute of Technology, MC 249-17,1200 East California Boulevard, Pasadena, California 91125, USA;

    International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia,ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO), Curtin University, GPO Box U1987,Perth, WA 6845, Australia;

    Astronomy Department, B-20 Hearst Field, Annex no. 3411, University of California at Berkeley, Berkeley, California 94720-3411, USA;

    Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    Physics Department, University of Durham, Durham DH13LE, UK;

    Physics Department, University of Durham, Durham DH13LE, UK;

    Physics Department, University of Durham, Durham DH13LE, UK;

    Physics Department, University of Durham, Durham DH13LE, UK;

    International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;

    Stockholm University, Oskar Klein Centre, AlbaNova, SE-106 91, Stockholm, Sweden.;

    School of Physics and Astronomy, University of Southampton, Southampton SOI 7 1BJ, UK.,Department of Astronomy, University of Cape Town, Private BagX3, Rondebosch 7701, Republic of South Africa.;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    Osservatorio Astronomicodi Capodimonte, INAF, Salita Moiariello 16,80131 Napoli, Italy.,lntemational Centre for Relativistic Astrophysics, Piazzale della Repubblica 2, 65122 Pescara, Italy.;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    Institute of Space Sciences (CSIC-IEEC), Campus UAB, Facultade de Ciencies, Torre C5 parell 2,08193 Bellaterra, Barcelona, Spain.;

    Physicsand Astronomy Department, 118 Kinard Laboratory, Clemson University, Clemson, South Carolina 29631-0978, USA;

    Department of Astrophysics, Astronomy and Mechanics, Faculty of Physics, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84 Zografou, Athens, Greece.;

    University Observatory Munich, Ludwig-Maximilians-Universitat, Scheinerstrasse 1,81679 Munchen, Germany.;

    Department of Physics and Nuclear Engineering, EUETIB (UPC-IEEC), calle Comte d'Urgell 187,08036 Barcelona, Spain.;

    University Observatory Munich, Ludwig-Maximilians-Universitat, Scheinerstrasse 1,81679 Munchen, Germany.;

    Foundation for Research and Technology-Hellas,Nikolaou Plastira 100, Vassilika Vouton, 71110 Heraklion, Crete,Greece.;

    Max-Planck-lnstitut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany;

    Osservatorio Astronomicodi Padova, VicoloOsservatorio 5,35122 Padova, Italy.;

    Astrophysics Group,Cavendish Laboratory,Cambridge University, JJ Thomson Avenue, Cambridge CB3 OHE, UK;

    Astrophysics Group,Cavendish Laboratory,Cambridge University, JJ Thomson Avenue, Cambridge CB3 OHE, UK;

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