A unified paradigm for the spectral and temporal evolution of Black Hole X-ray Binaries

Simple item page
dc.creatorPetrucci, P. O.
dc.creatorFerreira, J.
dc.creatorCabanac, C.
dc.creatorHenri, G.
dc.creatorPelletier, G.
dc.date2006-11-20
dc.date.accessioned2026-07-07T10:20:54Z
dc.date.available2026-07-07T10:20:54Z
dc.descriptionWe present a unified picture to explain the spectral states of BH binaries based on the two-flow model. In our view, the central regions have a multi-flow configuration consisting in (1) an outer standard accretion disc (SAD) down to a transition radius $r_{tr}$, (2) an inner magnetized jet emitting disc (JED) below $r_{tr}$ driving (3) a self-collimated non relativistic MHD jet surrounding, when conditions for pair creation are met, (4) a ultra relativistic pair beam. Large values of $r_{tr}$ correspond to Hard states while small values correspond to Soft states. In between these extremes, in the high intermediate state, $r_{tr}$ can reach values that switch on a pair cascade process giving birth to ultra-relativistic pair blobs that explain the superluminal events. In this model the accretion rate but also the disc magnetization $μ$ play important roles, the latter being necessarily in the range 0.1-1 for the MHD jet to exist. Then, with simple assumptions on $μ$, we propose an explanation for the hysteresis behavior observed in microquasars during their outburst. We also discuss the nature, in our framework, of the X-ray corona and the origin of the X-ray variability in the hard state. Preliminary results are discussed.
dc.description14 pages, 7 Figures. Contributed talk at the VIth Microquasar Workshop: "Microquasars and beyond" (Como, Italy), eds: T. Belloni et al. September 2006
dc.identifierhttps://arxiv.org/abs/astro-ph/0611628
dc.identifierhttp://arxiv.org/abs/astro-ph/0611628
dc.identifierPoSMQW6:036,2006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175002
dc.subjectAstrophysics
dc.titleA unified paradigm for the spectral and temporal evolution of Black Hole X-ray Binaries
dc.typetext

Files

Collections

arXiv