Hostname: page-component-848d4c4894-cjp7w Total loading time: 0 Render date: 2024-06-21T22:57:03.107Z Has data issue: false hasContentIssue false
  • English
  • Français

Time Lags of Horizontal Branch Oscillations in Z Source GX 5–1

Published online by Cambridge University Press:  26 May 2016

Jin-Lu Qu ,
Guo-Qiang Ding ,
Jian-Feng Ji  and
Ming-Xuan Zhang
Jin-Lu Qu
Affiliation:
Laboratory for High Energy Astrophysics, Institute of High Energy Physics, CAS, Beijing 100039, P. R. China
Guo-Qiang Ding
Affiliation:
Laboratory for High Energy Astrophysics, Institute of High Energy Physics, CAS, Beijing 100039, P. R. China
Jian-Feng Ji
Affiliation:
Depart of Engineering Physics, Tsinghua University, Beijing 100084, P. R. China
Ming-Xuan Zhang
Affiliation:
Laboratory for High Energy Astrophysics, Institute of High Energy Physics, CAS, Beijing 100039, P. R. China

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We investigated the time lags and the evolution of the cross spectrua of Z source GX 5-1, observed by Rossi X-ray Timing Explorer (RXTE), when it is in the horizontal branch oscillations. We showed that the time lags of 3 horizontal branch oscillations are related to the position on the hardness intensity diagram. 3 QPOs were shown to be of the hard time lags. But on the cross spectra, one is in a “dip”, one in a “bump”, another has not that chracteristic. The time lags of two of the QPOs decrease with QPO's frequency, and one has a trend increasing with its freuqency. In the normal branch, we found that there is no significant time lags in the present observational data.

Type
Part 6 X-Ray Binaries
Information
Symposium - International Astronomical Union , Volume 214: High Energy Processes and Phenomena in Astrophysics , 2003 , pp. 231 - 235
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Böttcher, M., & Liang, E. P. 1999, ApJ, 511, L37 Google Scholar
Cui, W. 1999, ApJ, 524, L59 Google Scholar
Kazanas, D., Hua, X. -M., & Titarchuk, L. 1997, ApJ, 480, 735 Google Scholar
Jonker, P.G., van der Klis, M., Homan, J., et al. 2002,MNRAS, astro-ph/0202420 Google Scholar
Nobili, L., Turolla, R., Zampieri, L., & Belloni, T. 2000, ApJ, 538, L137 Google Scholar
Payne, D. G., 1980, ApJ, 237, 951 Google Scholar
Poutanen, J., astro-ph/0002505 Google Scholar
Qu, J.L., Yu, W., & Li, T.P. 2001, ApJ, 555, 7 Google Scholar
Reig, P., Belloni, T., van der Klis, M., et al. 2000, ApJ, 541, 883 CrossRefGoogle Scholar
Shibazaki, N., Elsner, R. F., Bussard, R. W., et al. 1988, ApJ, 331, 247 Google Scholar
van der Klis, M., Hasinger, G., Stella, L., et al. 1987, ApJ, 319, L13 CrossRefGoogle Scholar
Vaughan, M., van der Klis, M., Wijers, R.A.M.J., et al. 1994, ApJ, 421, 738 Google Scholar
Vaughan, B.A., van der Klis, M., Lewin, W. H. G., et al. 1999, A&A, 343, 197 Google Scholar