The magnetic field evolution of ULX NuSTAR J095551+6940.8 in M82-a legacy of accreting magnetar

doi:10.1093/mnras/stw1041

	The magnetic field evolution of ULX NuSTAR J095551+6940.8 in M82-a legacy of accreting magnetar
	Pan, Y. Y.1,2; Song, L. M.1; Zhang, C. M.2,3; Tong, H.4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-09-01
卷号	461 期号:1 页码:2-5
关键词	Accretion Accretion Discs Binaries: Close Stars: Evolution Stars: Magnetars Stars: Magnetic Field X-rays: Stars
ISSN号	0035-8711
DOI	10.1093/mnras/stw1041
英文摘要	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.
WOS关键词	X-RAY PULSARS ; NEUTRON-STARS ; MILLISECOND RADIO ; BINARY ; CATALOG ; REPEATER ; ORIGIN ; GALAXY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000383272500001
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/23623]
专题	中国科学院紫金山天文台
通讯作者	Pan, Y. Y.
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Pan, Y. Y.,Song, L. M.,Zhang, C. M.,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):2-5.
APA	Pan, Y. Y.,Song, L. M.,Zhang, C. M.,&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),2-5.
MLA	Pan, Y. Y.,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):2-5.