The advection-dominated accretion flow for the anticorrelation between the X-ray photon index and the X-ray luminosity in neutron star low-mass X-ray binaries

ABSTRACT Observationally, an anticorrelation between the X-ray photon index Γ (obtained by fitting the X-ray spectrum between 0.5 and 10 keV with a single power law) and the X-ray luminosity L0.5-10 keV, i.e. a softening of the X-ray spectrum with decreasing L0.5-10 keV, is found in neutron star low...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 2020-08, Vol.496 (3), p.2704-2714
Hauptverfasser:	Qiao, Erlin, Liu, B F
Format:	Artikel
Sprache:	eng
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