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The magnetic field evolution of ULX NuSTAR J095551+6940.8 in M82-a legacy of accreting magnetar
Pan YY(潘元月); Song LM(宋黎明); Pan, YY; Song, LM; Zhang, CM; Tong, H
2016
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号461期号:1页码:2
通讯作者潘元月
摘要Ultraluminous X-ray sources are usually believed to be black holes with mass about 102-3M(circle dot). However, the recent discovery of NuSTAR J095551+ 6940.8 in M82 by Bachetti et al. shows that it holds the spin period P = 1.37 s and period derivative. P approximate to -2 x 10(-10) s s(-1), which provides a strong evidence that some ultraluminous X-ray sources could be neutron stars. We obtain that the source may be an evolved magnetar according to our simulation by employing the model of accretion induced the polar magnetic field decay and standard spin-up torque of an accreting neutron star. The results show that NuSTAR J095551+ 6940.8 is still in the spin-up process, and the polar magnetic field decays to about 4.5 x 10(12) Gafter accreting similar to 10(-2.5) M-circle dot, while the strong magnetic field exists in the out-polar region, which could be responsible for the observed low field magnetar. The ultra luminosity of the source can be explained by the beaming effect and two kinds of accretion-radial random accretion and disc accretion. Since the birth rate of magnetars is about ten per cent of the normal neutron stars, we guess that several ultraluminous X-ray sources should share the similar properties to that of NuSTAR J095551+6940.8.
文章类型Article
关键词accretion accretion discs binaries: close stars: evolution stars: magnetars stars: magnetic field X-rays: stars
DOI10.1093/mnras/stw1041
关键词[WOS]X-RAY PULSARS ; NEUTRON-STARS ; MILLISECOND RADIO ; BINARY ; CATALOG ; REPEATER ; ORIGIN ; GALAXY
语种英语
WOS记录号WOS:000383272500001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260826
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Pan YY,Song LM,Pan, YY,et al. The magnetic field evolution of ULX NuSTAR J095551+6940.8 in M82-a legacy of accreting magnetar[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,461(1):2.
APA 潘元月,宋黎明,Pan, YY,Song, LM,Zhang, CM,&Tong, H.(2016).The magnetic field evolution of ULX NuSTAR J095551+6940.8 in M82-a legacy of accreting magnetar.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,461(1),2.
MLA 潘元月,et al."The magnetic field evolution of ULX NuSTAR J095551+6940.8 in M82-a legacy of accreting magnetar".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 461.1(2016):2.
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