A possible origin of the Galactic Center magnetar SGR 1745-2900

doi:10.1088/1674-4527/17/6/54

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	A possible origin of the Galactic Center magnetar SGR 1745-2900
	Zheng, XP; Cheng Q(程泉); Zhang SN(张双南); Cheng, Q; Zhang, SN
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS天文和天体物理学研究
	2017
卷号	17 期号:6 页码:54
关键词	stars: neutron stars: magnetars stars: magnetic field pulsars: individual (SGR 1745-2900)
ISSN号	1674-4527
DOI	10.1088/1674-4527/17/6/54
文献子类	Article
英文摘要	Since there is a large population of massive O/B stars and putative neutron stars (NSs) located in the vicinity of the Galactic Center (GC), intermediate-mass X-ray binaries (IMXBs) constituted by an NS and a B-type star probably exist there. We investigate the evolutions of accreting NSs in IMXBs (similar to M82 X-2) with a similar to 5.2M circle dot companion and orbital period similar or equal to 2.53 d. By adopting a mildly super-Eddington rate. M = 6 x 10(-8) M circle dot yr(-1) for the early Case B Roche-lobe overflow (RLOF) accretion, we find that only in accreting NSs with quite elastic crusts (slippage factor s = 0.05) can the toroidal magnetic fields be amplified within 1 Myr, which is assumed to be the longest duration of the RLOF. These IMXBs will evolve into NS+white dwarf (WD) binaries if they are dynamically stable. However, before the formation of NS+WD binaries, the high stellar density in the GC will probably lead to frequent encounters between the NS+evolved star binaries (in post-early Case B mass transfer phase) and NSs or exchange encounters with other stars, which may produce single NSs. These NSs will evolve into magnetarswhen the amplified poloidal magnetic fields diffuse out to the NS surfaces. Consequently, our results provide a possible explanation for the origin of the GC magnetar SGR 1745-2900. Moreover, the accreting NSs with s > 0.05 will evolve into millisecond pulsars (MSPs). Therefore, our model reveals that the GC magnetars and MSPs could both originate from a special kind of IMXB.
WOS关键词	SAGITTARIUS-A-ASTERISK ; X-RAY BINARIES ; ROTATING RELATIVISTIC STARS ; SUPERMASSIVE BLACK-HOLE ; SOFT GAMMA-REPEATERS ; NEUTRON-STARS ; ENERGY INJECTION ; RADIO PULSARS ; MILLISECOND MAGNETAR ; SWIFT J1822.3-1606
WOS研究方向	Astronomy & Astrophysics
语种	英语
CSCD记录号	CSCD:5998339
WOS记录号	WOS:000408362700006
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284921]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zheng, XP,Cheng Q,Zhang SN,et al. A possible origin of the Galactic Center magnetar SGR 1745-2900[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS天文和天体物理学研究,2017,17(6):54.
APA	Zheng, XP,程泉,张双南,Cheng, Q,&Zhang, SN.(2017).A possible origin of the Galactic Center magnetar SGR 1745-2900.RESEARCH IN ASTRONOMY AND ASTROPHYSICS天文和天体物理学研究,17(6),54.
MLA	Zheng, XP,et al."A possible origin of the Galactic Center magnetar SGR 1745-2900".RESEARCH IN ASTRONOMY AND ASTROPHYSICS天文和天体物理学研究 17.6(2017):54.