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천문우주과학 연구동향

천문우주과학과 관련된 국내외 상위 학술논문 및 특허 정보를 제공해 드립니다.

활성 은하에서 분자 아웃플로우를 조절하는 블랙홀 강착 디스크 바람

Wind from the black-hole accretion disk driving a molecular outflow in an active galaxy
  • 작성자 : KASI
  • 작성일 : 2015-03-31
  • 조회수 : 2216
  • 저자F. Tombesi, M. Meléndez, S. Veilleux et al.,
  • Absract

     

     

    Powerful winds driven by active galactic nuclei are often thought to affect the evolution of both supermassive black holes and their host galaxies, quenching star formation and explaining the close relationship between black holes and galaxies. Recent observations of large-scale molecular outflows in ultraluminous infrared galaxies support this quasar-feedback idea, because they directly trace the gas fromwhich stars form. Theoreticalmodels suggest that these outflows originate as energy-conserving flows driven by fast accretiondisk winds. Proposed connections between large-scale molecular outflows and accretion-disk activity in ultraluminous galaxies were incomplete because no accretion-disk wind had been detected. Conversely, studies ofpowerful accretion-diskwindshave untilnowfocused only on X-ray observations of local Seyfert galaxies and a few higher-redshift quasars. Here we report observations of a powerful accretion-disk wind with a mildly relativistic velocity (a quarter that of light) in the X-ray spectrumof IRAS F1111913257, a nearby (redshift 0.189) optically classified type 1 ultraluminous infrared galaxy hosting a powerful molecular outflow. The active galactic nucleus is responsible for about 80 per cent of the emission, with a quasar-like luminosity of 1.531046 ergs per second.The energetics of these twotypes ofwide-angle outflows is consistent with the energyconserving mechanism that is the basis of the quasar feedback1 in active galactic nuclei that lack powerful radio jets (such jets are an alternative way to drive molecular outflows).


  • 게재정보NATURE(2015.03.25)에 게재된 논문임
  • 첨부파일
  • 원 문http://www.nature.com/nature/journal/v519/n7544/pdf/nature14261.pdf
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