Detailed Information on Publication Record
2019
Puffy Accretion Disks: Sub-Eddington, Optically Thick, and Stable
LANČOVÁ, Debora, David ABARCA, Włodek KLUŹNIAK, Maciek WIELGUS, Aleksander SA̧DOWSKI et. al.Basic information
Original name
Puffy Accretion Disks: Sub-Eddington, Optically Thick, and Stable
Authors
LANČOVÁ, Debora (203 Czech Republic, guarantor, belonging to the institution), David ABARCA (840 United States of America), Włodek KLUŹNIAK (616 Poland), Maciek WIELGUS (616 Poland), Aleksander SA̧DOWSKI (616 Poland), Ramesh NARAYAN (356 India), Jan SCHEE (203 Czech Republic, belonging to the institution), Gabriel TÖRÖK (203 Czech Republic, belonging to the institution) and Marek ABRAMOWICZ (616 Poland, belonging to the institution)
Edition
Astrophysical Journal Letters, 2019, 2041-8205
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
RIV identification code
RIV/47813059:19240/19:A0000443
Organization unit
Faculty of Philosophy and Science in Opava
UT WoS
000516538200010
Keywords in English
accretion; magnetohydrodynamical simulations; general relativity; radiative magnetohydrodynamics; black holes
Tags
Tags
International impact, Reviewed
Links
GA17-16287S, research and development project. LTI17018, research and development project.
Změněno: 21/4/2020 10:35, Ing. Petra Skoumalová
Abstract
V originále
We report on a new class of solutions of black hole accretion disks that we have found through three-dimensional, global, radiative magnetohydrodynamic simulations in general relativity. It combines features of the canonical thin, slim, and thick disk models but differs in crucial respects from each of them. We expect these new solutions to provide a more realistic description of black hole disks than the slim disk model. We are presenting a disk solution for a nonspinning black hole at a sub-Eddington mass accretion rate, Mdot = 0.6 Mdot_Edd. By the density scale-height measure the disk appears to be thin, having a high density core near the equatorial plane of height h_rho ~ 0.1 r, but most of the inflow occurs through a highly advective, turbulent, optically thick, Keplerian region that sandwiches the core and has a substantial geometrical thickness comparable to the radius, H ~ r. The accreting fluid is supported above the midplane in large part by the magnetic field, with the gas and radiation to magnetic pressure ratio beta ~ 1, this makes the disk thermally stable, even though the radiation pressure strongly dominates over gas pressure. A significant part of the radiation emerging from the disk is captured by the black hole, so the disk is less luminous than a thin disk would be at the same accretion rate.