High Energy Radiation from Neutron Star Binaries

Simple item page
dc.creatorDi Salvo, T.
dc.creatorStella, L.
dc.date2002-07-10
dc.date.accessioned2026-07-07T02:04:15Z
dc.date.available2026-07-07T02:04:15Z
dc.descriptionThis paper surveys our current knowledge of the hard X-ray emission properties of old accreting neutron stars in low mass X-ray binaries. Hard X-ray components extending up to energies of a few hundred keV have been clearly detected in sources of both the Atoll and Z classes. The presence and characteristics of these hard components are discussed in relation to source properties and state. An overall anticorrelation between the fraction luminosity in hard X-rays and mass accretion rate is apparent over different sources spanning a large range of luminosities as well as individual source undergoing state changes. Evidence for a second, yet unknown, parameter controlling the hard X-ray emission is emerging. We draw a parallel with the spectral properties of X-ray binaries hosting a stellar mass accreting black hole, and conclude that, at a merely phenomenological level, there appears to be a close analogy between the spectral properties of black hole candidates in their high and intermediate states and Z-sources. We briefly mention models that have been proposed for the hard X-ray emission of neutron star low mass X-ray binaries and comment on perspectives in the INTEGRAL era.
dc.description11 pages, including 4 figures. To appear in the proceedings of the XXII Moriond Astrophysics Meeting "The Gamma-Ray Universe" (Les Arcs, March 9-16, 2002), eds. A. Goldwurm, D. Neumann, and J. Tran Thanh Van, The Gioi Publishers (Vietnam)
dc.identifierhttps://arxiv.org/abs/astro-ph/0207219
dc.identifierhttp://arxiv.org/abs/astro-ph/0207219
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4681
dc.subjectAstrophysics
dc.titleHigh Energy Radiation from Neutron Star Binaries
dc.typetext

Files

Collections

arXiv