The Cross-Spectra of Cir X-1: Evolution of Time Lags

Details The Cross-Spectra of Cir X-1: Evolution of Time Lags The Cross-Spectra of Cir X-1: Evolution of Time Lags

2001-03-22

arxiv.org/abs/astro-ph/0103365v1

Astronomy and Astrophysics

Astrophysics

12 pages, 4 figures, accepted for publication in ApJ

Scientific paper

10.1086/321460

Earlier work showed that the track in the X-ray hardness-intensity diagram of Cir X-1 corresponds to a Z track in its color-color diagram. In this paper, we study the cross spectrum of Cir X-1 in different regions of the hardness-intensity diagram with $RXTE$/PCA data. Comparing the light curves of Cir X-1 for the energy band 1.8-5.1 keV to those for 5.1-13.1 keV, we find that Cir X-1 exhibits a hard time lag on the horizontal branch, and a soft time lag on both the normal and the flaring branch. This indicates that Cir X-1 is similar to GX 5-1 and Cyg X-2 on the horizontal branch, but is different from them on the normal branch. We briefly discuss the mechanism of the time lags in the context of Comptonization models.

Affiliated with

Also associated with

No associations

Rating

The Cross-Spectra of Cir X-1: Evolution of Time Lags 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 The Cross-Spectra of Cir X-1: Evolution of Time Lags, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Cross-Spectra of Cir X-1: Evolution of Time Lags will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-278131