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Does submillisecond pulsar XTE J1739-285 contain a weak magnetic neutron star or quark star?
Zhang, C. M.; Yin, H. X.; Zhao, Y. H.; Wei, Y. C.; Li, X. D.
2007-10-01
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
Volume119Issue:860Pages:1108-1113
AbstractThe possible detection of the fastest spinning nuclear-powered pulsar XTE J1739-285, of frequency 1122 Hz (0.8913 ms), arouses us to constrain the mass and radius of its central compact object and to infer the stellar matter composition: neutrons or quarks. Spun up by the accreting materials to such a high rotating speed, the compact star should have either a small radius or short innermost stable circular orbit. By the empirical relation between the upper kilohertz quasi-periodic oscillation frequency and star spin frequency, a strong constraint on mass and radius is obtained of 1.51 M-circle dot and 10.9 km, respectively, which excludes most equations of state (EOSs) of normal neutrons and strongly hints the star promisingly to be a strange quark star. Furthermore, the star magnetic field is estimated to be about 4 x 10(7) G < B < 10(9) G, which reconciles with those of millisecond radio pulsars, revealing the clues of the evolution linkage of two types of astrophysical objects.
Indexed BySCI
Language英语
WOS IDWOS:000250965300004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7892
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
2.Nanjing Univ, Dept Astron, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Zhang, C. M.,Yin, H. X.,Zhao, Y. H.,et al. Does submillisecond pulsar XTE J1739-285 contain a weak magnetic neutron star or quark star?[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2007,119(860):1108-1113.
APA Zhang, C. M.,Yin, H. X.,Zhao, Y. H.,Wei, Y. C.,&Li, X. D..(2007).Does submillisecond pulsar XTE J1739-285 contain a weak magnetic neutron star or quark star?.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,119(860),1108-1113.
MLA Zhang, C. M.,et al."Does submillisecond pulsar XTE J1739-285 contain a weak magnetic neutron star or quark star?".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 119.860(2007):1108-1113.
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