An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34

Details An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34 An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34

2000-09-13

arxiv.org/abs/astro-ph/0009194v2

Astronomy and Astrophysics

Astrophysics

23 pages, 22 figures, ApJ accepted

Scientific paper

10.1086/320234

We study correlations between the burst properties and the position in the color-color diagram of the low mass X-ray binary 4U 1728-34 using 21 bursts found in two data sets obtained with the Rossi X-ray Timing Explorer. Using spectral fits we analyze the spectral evolution during the bursts and determine the burst peak flux, temperature, rise time and fluence. Using dynamical power spectra we study the properties of the ~363 Hz burst oscillations. We find correlations between fluence, peak flux, the occurrence of radius expansion and the presence of burst oscillations, and the position of the source in the color-color diagram. The radius expansion bursts with and without burst oscillations differ both with respect to where they occur in the color-color diagram and in how the radius expansion takes place. We compare our results with those of a similar study by Muno et al. (2000) for KS 1731-26. Both KS 1731-260 and 4U 1728-34 show more or less the same behavior with respect to the dependence of the presence/absence of the burst oscillations on the position of the source in the color-color diagram, but the dependence of most of the spectral burst parameters on the position in the color-color diagram is clearly different. We find that the systematic absence in 4U 1728-34 of burst oscillations in the ``island'' state of the color-color diagram is not explained by the bursts involving mixed H-He burning, as may be the case in KS 1731--260 (Cumming & Bildsten 2000).

Affiliated with

Also associated with

No associations

Rating

An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34 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 An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-630138