Anti-correlated hard X-ray time lags in Galactic black hole sources

Details Anti-correlated hard X-ray time lags in Galactic black hole sources Anti-correlated hard X-ray time lags in Galactic black hole sources

2007-03-05

arxiv.org/abs/astro-ph/0703074v1

Astrophys.J.661:1055-1063,2007

Astronomy and Astrophysics

Astrophysics

14 pages, 7 figures, accepted for publication in ApJ

Scientific paper

10.1086/516771

We investigate the accretion disk geometry in Galactic black hole sources by measuring the time delay between soft and hard X-ray emissions. Similar to the recent discoveries of anti-correlated hard X-ray time lags in Cyg X-3 and GRS 1915+105, we find that the hard X-rays are anti-correlated with soft X-rays with a significant lag in another source: XTE J1550-564. We also find the existence of pivoting in the model independent X-ray spectrum during these observations. We investigate time-resolved X-ray spectral parameters and find that the variation in these parameters is consistent with the idea of a truncated accretion disk. The QPO frequency, which is a measure of the size of truncated accretion disk, too changes indicating that the geometric size of the hard X-ray emitting region changes along with the spectral pivoting and soft X-ray flux. Similar kind of delay is also noticed in 4U 1630-47.

Affiliated with

Also associated with

No associations

Rating

Anti-correlated hard X-ray time lags in Galactic black hole sources 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 Anti-correlated hard X-ray time lags in Galactic black hole sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-correlated hard X-ray time lags in Galactic black hole sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-113377