Hostname: page-component-cb9f654ff-pvkqz Total loading time: 0 Render date: 2025-09-03T06:57:25.148Z Has data issue: false hasContentIssue false
  • English
  • Français

Analysis of spectrum variations in Hercules X-1

Published online by Cambridge University Press:  30 December 2019

Denis Leahy Open the ORCID record for Denis Leahy [Opens in a new window]
Denis Leahy*
Affiliation:
Dept. of Physics & Astronomy, University of Calgary, Calgary, Canada email: leahy@ucalgary.ca
Rights & Permissions [Opens in a new window]

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.

. Hercules X-1 (Her X-1) was observed extensively by the Rossi X-ray Timing Explorer (RXTE) over its 17 year lifetime. Here, the archival RXTE/PCA observations of Her X-1 are analyzed with emphasis on the 35-day cycle dependence. Spectral fits are carried out and the 35-day phase dependences are characterized. The regular behaviours of the changes are interpreted in terms of the precessing accretion disk. We find that the most important variation is caused by the changing illumination of the inner edge of the disk, but other variations with different causes are also seen.

Keywords

X-rays: binariesaccretionaccretion disksstars: neutron

References

Abdallah, M. H. & Leahy, D. A. 2015, MNRAS, 453, 4222 CrossRefGoogle Scholar
Boynton, P. E., Crosa, L. M., & Deeter, J. E. 1980, ApJ, 237, 169 CrossRefGoogle Scholar
Crosa, L., & Boynton, P. E. 1980, ApJ, 235, 999 CrossRefGoogle Scholar
Gerend, D., & Boynton, P. E. 1976, ApJ, 209, 562 CrossRefGoogle Scholar
Igna, C. D. & Leahy, D. A. 2011, MNRAS, 418, 2283 CrossRefGoogle Scholar
Igna, C. D. & Leahy, D. A., 2012, MNRAS, 425, 8 CrossRefGoogle Scholar
Ji, L., Schulz, N., Nowak, M., Marshall, H. L., & Kallman, T. 2009, ApJ, 700, 977 CrossRefGoogle Scholar
Klochkov, D., Staubert, R., Postnov, K., Shakura, N., & Santangelo, A. 2009, A& A, 506, 1261 Google Scholar
Larwood, J. D., Nelson, R. P., Papaloizou, J. C. B., & Terquem, C. 1996, MNRAS, 282, 597 CrossRefGoogle Scholar
Leahy, D. A. 2002, MNRAS, 334, 847 CrossRefGoogle Scholar
Leahy, D. A. 2003, MNRAS, 342, 446 CrossRefGoogle Scholar
Leahy, D. A. 2004, MNRAS, 348, 932 CrossRefGoogle Scholar
Leahy, D. A. 2004, Astron. Nachr., 325, 205 CrossRefGoogle Scholar
Leahy, D. A. 2004, ApJ, 613, 517 CrossRefGoogle Scholar
Leahy, D. A. & Igna, C. D. 2010, ApJ, 713, 318 CrossRefGoogle Scholar
Leahy, D. A. & Igna, C. D. 2011, ApJ, 736, 74 CrossRefGoogle Scholar
Leahy, D. A. & Abdallah, M. H. 2014, ApJ, 793, 79 CrossRefGoogle Scholar
Leahy, D. A. 2015, ApJ, 800, 32 CrossRefGoogle Scholar
Maloney, P. R., Begelman, M. C., & Pringle, J. E. 1996, ApJ, 472, 582 CrossRefGoogle Scholar
Maloney, P. R., & Begelman, M. C. 1997, ApJ, 491, L43 CrossRefGoogle Scholar
Reynolds, A. P., Quaintrell, H., Still, M. D., Roche, P., Chakrabarty, D., & Levine, S. E. 1997, MNRAS, 288, 43 CrossRefGoogle Scholar
Schandl, S., & Meyer, F. 1994, A& A, 289, 149 Google Scholar
Scott, D. M., & Leahy, D. A. 1999, ApJ, 510, 974 CrossRefGoogle Scholar
Scott, D. M., Leahy, D. A., & Wilson, R. B. 2000, ApJ, 539, 392 CrossRefGoogle Scholar
Wijers, R. A. M. J., & Pringle, J. E. 1999, MNRAS, 308, 207 CrossRefGoogle Scholar