Hostname: page-component-54dcc4c588-2bdfx Total loading time: 0 Render date: 2025-09-11T23:10:06.898Z Has data issue: false hasContentIssue false
  • English
  • Français

Determining the neutron star surface magnetic field strength of two Z sources

Published online by Cambridge University Press:  21 February 2013

Guoqiang Ding ,
Chunping Huang  and
Yanan Wang
Guoqiang Ding
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China email: dinggq@gmail.com
Chunping Huang
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China email: dinggq@gmail.com University of Chinese Academy of Sciences, China
Yanan Wang
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China email: dinggq@gmail.com University of Chinese Academy of Sciences, China
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.

From the extreme position of disk motion, we infer the neutron star (NS) surface magnetic field strength (B0) of Z-source GX 17+2 and Cyg X-2. The inferred B0 of GX 17+2 and Cyg X-2 are ~(1–5)×108 G and ~(1–3)×108 G, respectively, which are not inferior to that of millisecond X-ray pulsars or atoll sources. It is likely that the NS magnetic axis of Z sources is parallel to the axis of rotation, which could result in the lack of pulsations in these sources.

Keywords

Compact objectNeutron starAccretion disk

References

Cackett, E. M., Altamirano, D., Patruno, A., Miller, J. M., Reynolds, M., Linares, M., & Wijnands, R. 2009, ApJ, 649, L21CrossRefGoogle Scholar
Chen, X., Zhang, S. N., & Ding, G. Q. 2006, ApJ, 650, 299CrossRefGoogle Scholar
Ding, G. Q., Zhang, S. N., Li, T. P., & Qu, J. L. 2006, ApJ, 645, 576CrossRefGoogle Scholar
Ding, G. Q., Zhang, S. N., Wang, N., Qu, J. L., & Yan, S. P. 2011, AJ, 142, 34Google Scholar
Di Salvo, T. & Burderi, L. 2003, A&A, 397, 723Google Scholar
Fock, W. B. 1996, ApJ, 470, L127CrossRefGoogle Scholar
Lamb, F. K., Pethick, C. J., & Pines, D. 1973, ApJ, 184, 271CrossRefGoogle Scholar
Pringle, J. E. & Rees, M. J. 1972, A&A, 21, 1Google Scholar
Wang, Y. M. 1995, ApJ, 449, L153Google Scholar
Yin, H. X., Zhang, C. M., Zhao, Y. H., Lei, Y. J., Qu, J. L., Song, L. M., & Zhang, F. 2007, A&A, 471, 381Google Scholar
Zhang, C. M. & Kojima, 2006, MNRAS, 366, 137Google Scholar
Zhang, S. N., Yu, W., & Zhang, W. 1998, ApJ, 494, L71CrossRefGoogle Scholar