Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
권호 표지
DOI QR코드

DOI QR Code

Thick Accretion Disk and Its Super Eddington Luminosity around a Spinning Black Hole

  • Jang, Uicheol (Department of Astronomy, Space Science and Geology, Chungnam National University) ;
  • Kim, Hongsu (Center for Theoretical Astronomy, Korea Astronomy and Space Science Institute) ;
  • Yi, Yu (Department of Astronomy, Space Science and Geology, Chungnam National University)
  • Received : 2021.02.01
  • Accepted : 2021.02.23
  • Published : 2021.03.15
Download PDF
⟨ Previous Next ⟩

Abstract

In the general accretion disk model theory, the accretion disk surrounding an astronomical object comprises fluid rings obeying Keplerian motion. However, we should consider relativistic and rotational effects as we close in toward the center of accretion disk surrounding spinning compact massive objects such as a black hole or a neutron star. In this study, we explore the geometry of the inner portion of the accretion disk in the context of Mukhopadhyay's pseudo-Newtonian potential approximation for the full general relativity theory. We found that the shape of the accretion disk "puffs up" or becomes thicker and the luminosity of the disk could exceed the Eddington luminosity near the surface of the compact spinning black hole.

Keywords

References

  1. Banados E, Venemans BP, Mazzucchelli C, Farina EP, Walter F, et al., An 800-million-solar-mass black hole in a significantly neutral universe at a redshift 7.5, Nature. 553, 473-476 (2018). https://doi.org/10.1038/nature25180
  2. Fan X, Wang F, Yang J, Keeton CR, Yue M, et al., The discovery of a gravitationally lensed Quasar at z=6.51, Astrophys. J. Lett. 870, L11 (2019).https://doi.org/10.3847/2041-8213/aaeffe
  3. Mortlock DJ, Warren SJ, Venemans BP, Patel M, Hewett PC, et al., A luminous quasar at a redshift of z = 7.085, Nature. 474, 616-619 (2011).https://doi.org/10.1038/nature10159
  4. Mukhopadhyay B, Description of pseudo-newtonian potential for the relativistic accretion disks around Kerr black holes, Astrophys. J. 581, 427-430 (2002). https://doi.org/10.1086/344227
  5. Paczynsky B, Witta, PJ, Thick accretion disks and supercritical luminosities, Astron. Astrophys. 88, 23-31 (1980).
  6. Shakura NI, Sunyaev RA, Black holes in binary systems. Observational appearance, Astron. Astrophys. 24, 337-355 (1973).
  7. Wu XB, Wang F, Fan X, Yi W, Zuo W, et al., An ultraluminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30, Nature. 518, 512-515 (2015). https://doi.org/10.1038/nature14241