Hostname: page-component-76fb5796d-wq484 Total loading time: 0 Render date: 2024-04-26T13:16:42.862Z Has data issue: false hasContentIssue false
  • English
  • Français

Luminosity Dependent Changes of Pulse Profiles in the X-ray Binary GX 1+4

Published online by Cambridge University Press:  05 March 2013

J. G. Greenhill ,
D. Galloway  and
M. C. Storey
J. G. Greenhill
Affiliation:
Physics Department, University of Tasmania, GPO Box 252C, Hobart, Tas. 7001, Australia; John.Greenhill@utas.edu.au
D. Galloway
Affiliation:
Physics Department, University of Tasmania, GPO Box 252C, Hobart, Tas. 7001, Australia; Duncan.Galloway@utas.edu.au Special Research Centre for Theoretical Astrophysics, School of Physics, University of Sydney, NSW 2006, Australia; michelle@physics.usyd.edu.au
M. C. Storey
Affiliation:
Special Research Centre for Theoretical Astrophysics, School of Physics, University of Sydney, NSW 2006, Australia; michelle@physics.usyd.edu.au
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.

We have reviewed the X-ray pulse profiles from a large number of observations of the accreting binary pulsar GX 1+4 obtained during the last 25 years. The profiles cover various energy ranges between 1 and 100 keV. Using these data we present a coherent picture of present and past pulse profiles and the variations of these pulse profiles with time. The pulse shape is dependent on both the X-ray luminosity and whether the pulsar is spinning up or down. Profiles measured during the GX 1+4 high state in the 1970s are all trailing edge bright. Subsequently the profiles have generally been symmetric or leading edge bright. Rossi X-ray Timing Explorer (RXTE) satellite data taken in July 1996 show that similar pulse shape variations can occur on a timescale of hours. The implications of this new information for accretion models is discussed.

Keywords

X-rays: starsaccretion diskspulsars: individual: GX 1+4
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 15 , Issue 2 , 1998 , pp. 254 - 258
Copyright
Copyright © Astronomical Society of Australia 1998

References

Chakrabarty, D., Bildsten, L., Grunsfeld, J. M., Koh, D. T., Prince, T. A., & Vaughan, B. A. 1997, ApJ, 474, 414 CrossRefGoogle Scholar
Cui, W. 1997, ApJ, 482, L163 CrossRefGoogle Scholar
Dotani, T., Kii, T., Nagase, F., Makishima, K., Ohashi, T., Sakao, T., Koyama, K., & Tuohy, I. R. 1989, PASJ, 41, 427 Google Scholar
Doty, J. P., Hoffman, J. A., & Lewin, W. H. G. 1981, ApJ, 243, 257 CrossRefGoogle Scholar
Elsner, R. F., Weisskopf, M. C., Apparao, K. M. V., Darbro, W., Ramsey, B. D., Williams, A. C., Grindlay, J. E., & Sutherland, P. G. 1985, ApJ, 297, 288 Google Scholar
Ghosh, P., & Lamb, F. K. 1979, ApJ, 234, 296 CrossRefGoogle Scholar
Giles, A. B., Galloway, D. K., Greenhill, J. G., Storey, M. C., & Swank, J. H. 1998, in preparationGoogle Scholar
Greenhill, J. G., Giles, A. B., Sharma, D. P., Dieters, S., Sood, R. K., Thomas, J. A., Waldron, L., Manchanda, R. K., Carli, R., Hammer, P., Kendziorra, E., Staubert, R., Bazzano, A., Ubertini, P., & La Padula, C. 1989, A&A, 208, L1 Google Scholar
Greenhill, J. G., Sharma, D. P., Dieters, S. W. B., Sood, R. K., Waldron, L., & Storey, M. C. 1993, MNRAS, 260, 21 Google Scholar
Kendziorra, E., Staubert, R., Reppin, C., Pietsch, W., Voges, W.,& Trümper, J. 1982, in Galactic X-ray Sources, ed. P. Sanford et al. (New York: Wiley), p. 205 Google Scholar
Kotani, T., Dotani, T., Nagase, F., Greenhill, J., Pravdo, S. H., & Angelini, L. 1997, preprintGoogle Scholar
Kraus, U., Nollert, H. P., Ruder, H., & Riffert, H. 1995, ApJ, 450, 763 Google Scholar
Laurent, P., Salotti, L., Paul, J., Lebrun, F., Denis, M., Barret, D., Jourdain, E., Roques, J. P., Churazov, E., Gilfavov, M., Sunyaev, R., Diachkov, N., Khavenson, N., Novikov, B., Chulkov, I., & Kuznetzov, A. 1993, A&A, 278, 444 Google Scholar
Lewin, W. H. G., Ricker, G. R., & McClintock, J. E. 1971, ApJ, 169, L17 Google Scholar
Makishima, K., Ohashi, T., Sakao, T., Dotani, T., Inoue, H., Koyama, K., Makino, F., Mitsuda, K., Nagase, F., Thomas, H. D., Turner, M. J. L., Kii, T., & Tawara, Y. 1988, Nature, 333, 746 CrossRefGoogle Scholar
Maurer, G. S., Johnson, W. N., Kurfess, J. D., & Strickman, M. S. 1982, ApJ, 254, 271 Google Scholar
Mony, B., Kendziorra, E., Maisack, M., Staubert, R., Englhauser, J., Döbereiner, S., Pietsch, W., Reppin, C., Trümper, J., Churazov, E. M., Gilfanov, M. R., & Sunyaev, R. 1991, A&A, 247, 405 Google Scholar
Nelson, R. W., Vaughan, B. A., Bildsten, L., Finger, M. H., Wilson, R. B., & Rubin, B. C. 1997, ApJ, 488, L117 CrossRefGoogle Scholar
Padden, W. E. P., & Storey, M. C. 1986, PASA, 6, 446 Google Scholar
Paul, B., Agrawal, P. C., Rao, A. R., & Manchanda, R. K. 1997, A&A, 319, 507 Google Scholar
Storey, M. C., Greenhill, J. G., & Kotani, T. 1998, PASA, 15, 217+CrossRefGoogle Scholar
Wang, Y. M., & Welter, G. L. 1981, A&A, 102, 97 Google Scholar
White, N. E., Swank, J. H., & Holt, S. S. 1983, ApJ, 270, 711 Google Scholar