Multiwavelength Studies of the Black Hole X-ray Binary V404 Cygni

Details Multiwavelength Studies of the Black Hole X-ray Binary V404 Cygni Multiwavelength Studies of the Black Hole X-ray Binary V404 Cygni

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.4802b&link_type=abstract

American Astronomical Society, AAS Meeting #211, #48.02; Bulletin of the American Astronomical Society, Vol. 39, p.809

Astronomy and Astrophysics

Astronomy

Scientific paper

We present multiwavelength observations of the black hole X-ray nova V404 Cyg in quiescence. Its X-ray quiescent spectrum can be best fitted by a simple power law with slope gamma 2, using both the Chandra X-ray Observatory and XMM-Newton, in which we find no evidence for the presence of fluorescent or H-like/He-like iron emission. The spectra are consistent with that expected for the advection-dominated accretion flow (ADAF). We also present a search for quasi-periodic oscillations in new optical power density spectra to attempt to constrain the ADAF transition radius. We acknowledge support from the XMM-Newton Guest Observer program and the LaSpace GSRA program.

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