Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Puffy Accretion Disks: Su… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Puffy Accretion Disks: Sub-Eddington, Optically Thick, and Stable

Artikel i vetenskaplig tidskrift
Författare D. Lančová
D. Abarca
Wł Kluźniak
M. Wielgus
A. Sadowski
R. Narayan
J. Schee
G. Török
Marek A Abramowicz
Publicerad i Astrophysical Journal Letters
Volym 884
Nummer/häfte 2
ISSN 2041-8205
Publiceringsår 2019
Publicerad vid Institutionen för fysik (GU)
Språk en
Länkar dx.doi.org/10.3847/2041-8213/ab48f5
Ämneskategorier Astronomi, astrofysik och kosmologi

Sammanfattning

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,. By the density scale-height measure the disk appears to be thin, having a high density core near the equatorial plane of height, 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 β ∼ 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. © 2019. The American Astronomical Society. All rights reserved..

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?