Multiwavelength Correlations in V404 Cyg in Quiescence

Details Multiwavelength Correlations in V404 Cyg in Quiescence Multiwavelength Correlations in V404 Cyg in Quiescence

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.4002h&link_type=abstract

American Astronomical Society, HEAD meeting #8, #40.02; Bulletin of the American Astronomical Society, Vol. 36, p.1205

Astronomy and Astrophysics

Astronomy

Scientific paper

We report simultaneous X-ray, optical, and radio observations of V404 Cyg in quiescence. The X-ray flux varied dramatically by a factor of >20 during a 60 ks observation. X-ray variations were well correlated with those in Hα , although the latter include an approximately constant component as well. Correlations can also be seen with the optical continuum, although these are less clear. We see no large lag between X-ray and optical line variations; this implies they are causally connected on short timescales. As in previous observations, Hα flares exhibit a double-peaked profile suggesting emission distributed across the accretion disk. The peak separation is consistent with material extending outward to at least the circularization radius. The prompt response in the entire Hα line confirms that the line variability is powered by X-ray (and/or EUV) irradiation. The origin of the optical continuum variability, whether reprocessing or synchrotron, remains less clear. We also see substantial radio variability at this epoch suggesting sustained outflow of material in quiescence.
Chandra observations were supported by NASA grant GO3-4044X.

Affiliated with

Also associated with

No associations

Rating

Multiwavelength Correlations in V404 Cyg in Quiescence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Multiwavelength Correlations in V404 Cyg in Quiescence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiwavelength Correlations in V404 Cyg in Quiescence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1179431