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Energy and time-lag spectra of galactic black-hole X-ray sources in the low/hard state

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Energy and time-lag spectra of galactic black-hole X-ray sources in the low/hard state

dc.contributor.author	Reig Torres, Pablo
dc.contributor.author	Kylafis, N.D.
dc.contributor.author	Giannios, Dimitrios
dc.date.accessioned	2010-07-30T11:03:54Z
dc.date.available	2010-07-30T11:03:54Z
dc.date.issued	2003
dc.identifier.uri	http://hdl.handle.net/10550/16741
dc.description.abstract	Most, probably all, accreting binaries that are believed to contain a black-hole emit radio waves when they are in the low/hard state. Whenever this radio emission has been resolved, a jet-like structure has become apparent. We propose that Compton upscattering of low-energy photons in the jet can explain both the energy spectra and the time lags versus Fourier frequency observed in the low/hard state of black-hole systems. The soft photons originate in the inner part of the accretion disk. We have performed Monte Carlo simulations of Compton upscattering in a jet and have found that for a rather wide range of values of the parameters we can obtain power-law high-energy X-ray spectra with photon-number index in the range 1.5–2 and power-law time lags versus Fourier frequency with index ∼0.7. The black-hole source Cyg X-1 in the low/hard state is well described by our model.	en
dc.language.iso	en	en
dc.relation	http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2003/19/aafa313.pdf	en
dc.source	REIG TORRES, Pablo ; Kylafis, N.D. ; Giannios, Dimitrios, 2003, Energy and time-lag spectra of galactic black-hole X-ray sources in the low/hard state, Astronomy and Astrophysics, vol. 403, no. 1, p. L15-L18	en
dc.title	Energy and time-lag spectra of galactic black-hole X-ray sources in the low/hard state	en
dc.type	info:eu-repo/semantics/article	en
dc.type	info:eu-repo/semantics/publishedVersion	en
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA	en
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia	en
dc.identifier.doi	10.1051/0004-6361:20030449	en
dc.description.private	Reig Torres, Pablo, Pablo.Reig@uv.es	en