Till sidans topp

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

Tipsa en vän
Utskriftsversion

The slimming effect of ad… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

The slimming effect of advection on black-hole accretion flows

Artikel i vetenskaplig tidskrift
Författare J. P. Lasota
R. S. S. Vieira
A. Sadowski
R. Narayan
Marek A Abramowicz
Publicerad i Astronomy & Astrophysics
Volym 587
Sidor article no. A13
ISSN 1432-0746
Publiceringsår 2016
Publicerad vid Institutionen för fysik (GU)
Sidor article no. A13
Språk en
Länkar dx.doi.org/10.1051/0004-6361/201527...
Ämnesord accretion, accretion disks, black hole physics, relativistic magnetohydrodynamic simulations, super-eddington accretion, x-ray sources, dominated accretion, thick accretion, vertical structure, polish doughnuts, tidal disruption, disk model, jets
Ämneskategorier Astronomi, astrofysik och kosmologi

Sammanfattning

Context. At super-Eddington rates accretion flows onto black holes have been described as slim (aspect ratio H/R less than or similar to 1) or thick (H/R > 1) discs, also known as tori or (Polish) doughnuts. The relation between the two descriptions has never been established, but it was commonly believed that at sufficiently high accretion rates slim discs inflate, becoming thick. Aims. We wish to establish under what conditions slim accretion flows become thick. Methods. We use analytical equations, numerical 1 + 1 schemes, and numerical radiative MHD codes to describe and compare various accretion flow models at very high accretion rates. Results. We find that the dominant effect of advection at high accretion rates precludes slim discs becoming thick. Conclusions. At super-Eddington rates accretion flows around black holes can always be considered slim rather than thick.

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?