General Relativistic, Neutrino-Assisted MHD winds - Theory and Application to GRBs. I. Schwarzschild Geometry
| dc.creator | Levinson, Amir | |
| dc.date | 2006-02-16 | |
| dc.date | 2006-05-04 | |
| dc.date.accessioned | 2026-07-07T10:27:50Z | |
| dc.date.available | 2026-07-07T10:27:50Z | |
| dc.description | (short version) - A model for GRMHD disk outflows with neutrino-driven mass ejection is developed,and employed to calculate the structure of the outflow in the sub-slow magnetosonic region and the mass loading of the outflow, under conditions anticipated in the central engines of gamma-ray bursts. The dependence of the mass flux on the conditions in the disk, on magnetic field geometry, and on other factors is carefully examined for a range of neutrino luminosities expected in hyperaccreting black holes. The fraction of neutrino luminosity that is being converted to kinetic energy flux is shown to be a sensitive function of the effective neutrino temperature at the flow injection point, and the shape of magnetic field lines in the sub-slow region, but is practically independent of the strength of poloidal and toroidal magnetic fields. We conclude that magnetic launching of ultra-relativistic polar outflows from the innermost parts of the disk is in principle possible provided the neutrino luminosity is sufficiently low, $L_ν\simlt10^{52}$ erg s$^{-1}$ or so. The conditions found to be optimal for the launching of an ultra-relativistic jet are also the conditions favorable for large neutron-to-proton ratio in the disk. | |
| dc.description | 28 pages, 8 figures, ApJ in press. Post refereed version, more discussion plus additional figure added | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0602358 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0602358 | |
| dc.identifier | Astrophys.J.648:510-522,2006 | |
| dc.identifier | doi:10.1086/505635 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177273 | |
| dc.subject | Astrophysics | |
| dc.title | General Relativistic, Neutrino-Assisted MHD winds - Theory and Application to GRBs. I. Schwarzschild Geometry | |
| dc.type | text |