The collapse of gas discs in non-axisymmetric galaxy cores
| dc.creator | Sanders, R. H. | |
| dc.date | 2006-12-04 | |
| dc.date | 2006-12-18 | |
| dc.date.accessioned | 2026-07-07T07:35:48Z | |
| dc.date.available | 2026-07-07T07:35:48Z | |
| dc.description | Below a threshold energy, gas in the constant density core of a triaxial galaxy can find no simple non-intersecting periodic orbit to act as an attractor for its trajectory (El-Zant et al. 2003). If a disc of gas arriving from further out in the galaxy dissipates sufficient energy to fall below this threshold, it will thereafter collapse into the very centre. Such a mechanism may be relevant to the early growth of super-massive black holes at the Eddington limit and the appearance of the quasar phenomenon at high redshift. This process is self-limiting in the sense that, when the black hole mass has grown to a significant fraction of the core mass, simple angular momentum conserving orbits are restored and accretion reverts to the slow viscous mode. The mechanism depends upon the pre-existence of constant density cores in triaxial spheroidal galaxies. | |
| dc.description | 8 pages, 8 figures, a movie of simulations may be viewed at http://www.astro.rug.nl/~sanders/movie.html, important reference to El-Zant et al. included with additional discussion | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0612095 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0612095 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/120214 | |
| dc.subject | Astrophysics | |
| dc.title | The collapse of gas discs in non-axisymmetric galaxy cores | |
| dc.type | text |