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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
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| Reig Torres, Pablo; Kylafis, N.D.; Giannios, Dimitrios | |
| This document is a artículo publicadoDate2003 | |
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Este documento está disponible también en : http://hdl.handle.net/10550/16741 |
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| 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. | |
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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 |
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| http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2003/19/aafa313.pdf |