Combined Spectral and Timing Analysis of the Black Hole Candidate MAXI J1659−152, Discovered by MAXI and Swift

DOI DOI PDF 被引用文献5件 参考文献51件 オープンアクセス
  • Kazutaka Yamaoka
    1Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara 252-5258
  • Ryan Allured
    2Department of Physics and Astronomy, University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA
  • Philip Kaaret
    2Department of Physics and Astronomy, University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA
  • Jamie A. Kennea
    3Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA
  • Toshihiro Kawaguchi
    4Center for Computational Sciences, University of Tsukuba, Ten-nodai, 1-1-1 Tsukuba, Ibaraki 305-8577
  • Poshak Gandhi
    5Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshino-dai, Chuo-ku, Sagamihara 252-5210
  • Nicholai Shaposhnikov
    6Department of Astronomy, CRESST/University of Maryland, College Park, MD 20742, USA
  • Yoshihiro Ueda
    8Department of Astronomy, Kyoto University, Oiwake-cho, Sakyo-ku, Kyoto 606-8502
  • Satoshi Nakahira
    9MAXI Team, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198
  • Taro Kotani
    10Research Institute for Science and Engineering, Waseda University, 17 Kikui-cho, Shinjuku-ku, Tokyo 162-0044
  • Hitoshi Negoro
    11Department of Physics, Nihon University, 1-8-14 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8308
  • Ichiro Takahashi
    1Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara 252-5258
  • Atsumasa Yoshida
    1Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara 252-5258
  • Nobuyuki Kawai
    12Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551
  • Satoshi Sugita
    13EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 yamaoka@phys.aoyama.ac.jp

書誌事項

公開日
2012-04-25
資源種別
journal article
DOI
  • 10.1093/pasj/64.2.32
  • 10.48550/arxiv.1110.6512
公開者
Oxford University Press (OUP)

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説明

<jats:title>Abstract</jats:title> <jats:p>We report on X-ray spectral and timing results of a new black hole candidate (BHC), MAXI J1659$-$152, with an orbital period of 2.41 hr (shortest among BHCs) in a 2010 outburst from 65 Rossi X-ray Timing Explorer (RXTE) observations and 8 simultaneous Swift and RXTE observations. According to the definitions of the spectral states in Remillard and McClintock (2006, ARA&A, 44, 49), most of the observations have been classified into the intermediate state. All of the X-ray broadband spectra can be modeled by a multi-color disk plus a power-law with an exponential cutoff or a multi-color disk plus a Comptonization component. During the initial phase of the outburst, a high-energy cutoff was visible at 30–40 keV. The innermost radius of the disk gradually decreased by a factor of more than 3 from the onset of the outburst, and reached a constant value of 35$\ d_{10}$cos$\ i$$^{-1/2}$ km, where $\ d_{10}$ is the distance in units of 10 kpc and $\ i$ is the inclination. The type-C quasi-periodic oscillation (QPO) frequency varied from 1.6 Hz to 7.3 Hz in association with a change of the innermost radius, while the innermost radius remained constant during the type-B QPO detections at 1.6–4.1 Hz. Hence, we suggest that the origin of the type-B QPOs is different from that of type-C QPOs, the latter of which would originate from the disk truncation radius. Assuming the constant innermost radius in the latter phase of the outburst as the innermost stable circular orbit, the black hole mass in MAXI J1659$-$152 is estimated to be 3.6–8.0$\ M_{\odot}$ for a distance of 5.3–8.6 kpc and an inclination angle of 60$^{\circ}$–75$^{\circ}$.</jats:p>

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