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천문우주과학 연구동향

천문우주과학과 관련된 국내외 상위 학술논문 및 특허 정보를 제공해 드립니다.

강착 디스크의 밝기에 비해 훨씬 더큰 상대성 제트류 에너지

The power of relativistic jets is larger than the luminosity of their accretion disks
  • 작성자 : KASI
  • 작성일 : 2014-11-25
  • 조회수 : 3493
  • 저자G. Ghisellini, F. Tavecchio, L. Maraschi, et al.
  • Absract


    Theoretical models for the production of relativistic jets from active galactic nuclei predict that jet power arises from the spin and mass of the central supermassive black hole, as well as from the magnetic field near the event horizon. The physical mechanism underlying the contribution from the magnetic field is the torque exerted on the rotating black hole by the field amplified by the accreting material. If the squared magnetic field is proportional to the accretion rate, then there will be a correlation between jet power and accretion luminosity. There is evidence for such a correlation, but inadequate knowledge of the accretion luminosity of the limited and inhomogeneous samples used prevented a firm conclusion. Here we report an analysis of archival observations of a sample of blazars (quasars whose jets point towards Earth) that overcomes previous limitations. We find a clear correlation between jet power, as measured through the γ-ray luminosity, and accretion luminosity, as measured by the broad emission lines, with the jet power dominating the disk luminosity, in agreement with numerical simulations. This implies that the magnetic field threading the black hole horizon reaches the maximum value sustainable by the accreting matter.


  • 게재정보NATURE(2014.11.20)에 게재된 논문임
  • 첨부파일
  • 원 문http://www.nature.com/nature/journal/v515/n7527/full/nature13856.html
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