SIMBAD references

2007ApJ...667..427B - Astrophys. J., 667, 427-432 (2007/September-3)

The spectrum of the black hole X-ray nova V404 Cygni in quiescence as measured by XMM-Newton.

BRADLEY C.K., HYNES R.I., KONG A.K.H., HASWELL C.A., CASARES J. and GALLO E.

Abstract (from CDS):

We present XMM-Newton observations of the black hole X-ray nova V404 Cyg in quiescence. Its quiescent spectrum can be best fitted by a simple power law with slope Γ∼2. The spectra are consistent with that expected for the advection-dominated accretion flow (ADAF). V404 Cyg was roughly equal in luminosity compared to the previous observation of Chandra. We see variability of a factor of 4 during the observation. We find no evidence for the presence of fluorescent or H-like/He-like iron emission, with upper limits of 52 and 110 eV, respectively. The limit on the fluorescent emission is improved by a factor of 15 over the previous estimate, and the restriction on H-like/He-like emission is lower than predicted from models by a factor of roughly 2.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Black Hole Physics - stars: individual (V404 Cyg) - X-Rays: Stars

Simbad objects: 6

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2021.02.28-21:00:35

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