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Distribution of twin kHz QPOs in LMXBs

Published online by Cambridge University Press:  21 February 2013

D. H. Wang  and
L. Chen
D. H. Wang
Affiliation:
Astronomy Department, Beijing Normal University, Beijing 100875, China email: [email protected]
L. Chen
Affiliation:
Astronomy Department, Beijing Normal University, Beijing 100875, China email: [email protected]
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Abstract

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With kilohertz quasi-periodic oscillation (kHz QPO) sources in neutron star low mass X-ray binaries (NS-LMXBs) published up to now, we analyze the centroid frequency (ν) distribution of twin kHz QPOs. We find that Atoll and Z sources show the similar distributions of ν1 and ν2, which indicate that twin kHz QPOs may be the common property of NS-LXMBs and have the similar physical origins. The mean values of ν1 and ν2 in Atoll sources are higher than those in Z sources, and we consider that this may because the QPO signals are sheltered by the thicken accretion disk or corona in Z sources. The maximums of ν2 in both Atoll and Z sources are the same order as the Keplerian orbital frequency of the NS surface, so kHz QPOs could occur near the NS surface.

Keywords

X-rays: binariesstars: neutronaccretionaccretion disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 327 - 328
Copyright
Copyright © International Astronomical Union 2013

References

Barret, D., Boutelier, M., & Miller, M. C. 2011, ApJ, 728, 9CrossRefGoogle Scholar
Belloni, T., Méndez, M., & Homan, J. 2007, MNRAS, 376, 1133CrossRefGoogle Scholar
Liu, Q. Z., van Paradijs, J., & van den Heuvel, E. P. J. 2007, A&A, 469, 807Google Scholar
Méndez, M. 2006, MNRAS, 371, 1925CrossRefGoogle Scholar
van der Klis, M. 2000, ARAA, 38, 717CrossRefGoogle Scholar
van der Klis, M. 2006, in Lewin, W. H. G., van der Klis, M., eds, Compact Stellar X-Ray Sources, Cambridge Univ. Press, Cambridge, p. 39Google Scholar
van der Klis, M. 2008, in Wijnands, R.et al., eds, A Decade of Accreting Millisecond X-Ray Pulsars, AIP Conf. Ser. Vol. 1068. Am. Inst. Phys., Melville, NY, p. 163Google Scholar
Zhang, C. M. 2004, A&A, 423, 401Google Scholar
Zhang, C. M., Yin, H. X., Zhao, Y. H.et al. 2006, MNRAS, 366, 1373Google Scholar