2008A&A...489..481K


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.27CET04:46:36

2008A&A...489..481K - Astronomy and Astrophysics, volume 489, 481-487 (2008/10-2)

A jet model for Galactic black-hole X-ray sources: some constraining correlations.

KYLAFIS N.D., PAPADAKIS I.E., REIG P., GIANNIOS D. and POOLEY G.G.

Abstract (from CDS):

Some recent observational results impose significant constraints on all the models that have been proposed to explain the Galactic black-hole X-ray sources in the hard state. In particular, it has been found that during the hard state of Cyg X-1 the power-law photon number spectral index, Γ, is correlated with the average time lag, <tlag>, between hard and soft X-rays. Furthermore, the peak frequencies of the four Lorentzians that fit the observed power spectra are correlated with both Γ and <tlag>. We have investigated whether our jet model can reproduce these correlations. We performed Monte Carlo simulations of Compton upscattering of soft, accretion-disk photons in the jet and computed the time lag between hard and soft photons and the power-law index Γ of the resulting photon number spectra. We demonstrate that our jet model naturally explains the above correlations, with no additional requirements and no additional parameters.

Abstract Copyright:

Journal keyword(s): radiation mechanisms: non-thermal - accretion, accretion disks - black hole physics - methods: statistical - X-rays: binaries

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* KV UMa HXB 11 18 10.7922353051 +48 02 12.319175505     12.25     K5V-M1V 733 0
2 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3982 0

    Equat.    Gal    SGal    Ecl

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