An Accretion-Ejection Instability in magnetized disks
| dc.creator | Tagger, M. | |
| dc.creator | Pellat, R. | |
| dc.date | 1999-07-20 | |
| dc.date.accessioned | 2026-07-07T02:32:35Z | |
| dc.date.available | 2026-07-07T02:32:35Z | |
| dc.description | We present an instability occurring in the inner part of disks threaded by a moderately strong vertical (poloidal) magnetic field. Its mechanism is such that a spiral density wave in the disk, driven by magnetic stresses (rather than self-gravity as in galactic spirals), becomes unstable by exchanging angular momentum with a Rossby vortex it generates at its corotation radius. This angular momentum can then ``leak'' as Alfven waves emitted toward the corona of the disk thus providing, as an element of the accretion process, an energetic source for a wind or a jet. As galactic spirals, this instability forms low azimuthal wavenumber, standing spiral patterns which might provide an explanation for low-frequency QPOs in low-mass X-ray binaries. | |
| dc.description | 15 pages, 10 figures, to be published in A&A. single gzipped, tared file | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9907267 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9907267 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14513 | |
| dc.subject | Astrophysics | |
| dc.title | An Accretion-Ejection Instability in magnetized disks | |
| dc.type | text |