Transfer of energy and angular momentum in magnetic coupling process

Simple item page
dc.creatorWang, D. X.
dc.creatorLei, W. H.
dc.creatorMa, R. Y.
dc.date2003-03-03
dc.date2003-05-24
dc.date.accessioned2026-07-07T02:07:46Z
dc.date.available2026-07-07T02:07:46Z
dc.descriptionThe transfer of energy and angular momentum in the magnetic coupling (MC) of a rotating black hole (BH) with its surrounding accretion disc is discussed based on a mapping relation derived by considering the conservation of magnetic flux with two basic assumptions: (i)the magnetic field on the horizon is constant, (ii) the magnetic field on the disc surface varies as a power law with the radial coordinate of the disc. The following results are obtained: (i) the transfer direction of energy and angular momentum between the BH and the disc depends on the position of a co-rotation radius relative to the MC region on the disc, which is eventually determined by the BH spin; (ii) the evolution characteristics of a rotating BH in the MC process without disc accretion are depicted in a parameter space, and a series of values of the BH spin are given to indicate the evolution characteristics; (iii) the efficiency of converting accreted mass into radiation energy of a BH-disc system is discussed by considering coexistence of disc accretion and the MC process; (iv) the MC effects on disc radiation and emissivity index are discussed and it is concluded that they are consistent with the recent XMM-Newton observation of the nearby bright Seyfert 1 galaxy MCG-6-30-15 with reference to a variety of parameters of the BH-disc system.
dc.description10 pages, 19 figures, accepted by MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0303050
dc.identifierhttp://arxiv.org/abs/astro-ph/0303050
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/5808
dc.subjectAstrophysics
dc.titleTransfer of energy and angular momentum in magnetic coupling process
dc.typetext

Files

Collections

arXiv