A strange star scenario for the formation of eccentric millisecond pulsar PSR J1946+3417

doi:10.1088/1674-4527/21/9/231

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	A strange star scenario for the formation of eccentric millisecond pulsar PSR J1946+3417
	Jiang, Long 1,2,3; Wang, Na 1; Chen, Wen-Cong 2,3; Liu, Wei-Min 3; Leng, Chun-Wei 3; Yuan, Jian-Ping 1; Qian, Xiang-Li 4
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2021-11-01
卷号	21 期号:9 页码:8
关键词	stars neutron stars evolution pulsars individual (J1946+3417)
ISSN号	1674-4527
DOI	10.1088/1674-4527/21/9/231
通讯作者	Wang, Na(na.wang@xao.ac.cn) ; Chen, Wen-Cong(chenwc@pku.edu.cn)
英文摘要	PSR J1946+3417 is a millisecond pulsar (MSP) with a spin period P similar or equal to 3.17 ms. Harbored in a binary with an orbital period P (b) similar or equal to 27 days, the MSP is accompanied by a white dwarf (WD). The masses of the MSP and the WD were determined to be 1.83 M (circle dot) and 0.266 M (circle dot), respectively. Specially, its orbital eccentricity is e similar or equal to 0.134, which is challenging the recycling model of MSPs. Assuming that the neutron star in a binary may collapse to a strange star when its mass reaches a critical limit, we propose a phase transition (PT) scenario to account for the origin of the system. The sudden mass loss and the kick induced by asymmetric collapse during the PT may result in the orbital eccentricity. If the PT event takes place after the mass transfer ceases, the eccentric orbit cannot be re-circularized in the Hubble time. Aiming at the masses of both components, we simulate the evolution of the progenitor of PSR J1946+3417 via MESA. The simulations show that an NS / main sequence star binary with initial masses of 1.4+1.6 M (circle dot) in an initial orbit of 2.59 days will evolve into a binary consisting of a 2.0 M (circle dot) MSP and a 0.27 M (circle dot) WD in an orbit of similar to 21.5 days. Assuming that the gravitational mass loss fraction during PT is 10%, we simulate the effect of PT via the kick program of BSE with a velocity of sigma (PT) = 60 km s(-1). The results show that the PT scenario can reproduce the observed orbital period and eccentricity with higher probability than other values.
资助项目	CAS 'Light of West China' Program[2018-XBQNXZ-B-022] ; National Natural Science Foundation of China[11803018] ; National Natural Science Foundation of China[11733009] ; National Natural Science Foundation of China[11773015] ; National Natural Science Foundation of China[U2031116] ; National Natural Science Foundation of China[11605110] ; National Key Research and Development Program of China[2016YFA0400803] ; Program for Innovative Research Team (in Science and Technology) at the University of Henan Province ; Key laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education
WOS关键词	MAGNETIC-FIELD DECAY ; ACCRETION-INDUCED COLLAPSE ; X-RAY BINARIES ; EQUATION-OF-STATE ; NEUTRON-STARS ; LOW-MASS ; QUARK MATTER ; STELLAR EVOLUTION ; RADIO PULSARS ; WHITE-DWARFS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000714228900001
资助机构	CAS 'Light of West China' Program ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Program for Innovative Research Team (in Science and Technology) at the University of Henan Province ; Key laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4336]
专题	脉冲星研究团组
通讯作者	Wang, Na; Chen, Wen-Cong
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Qingdao Univ Technol, Sch Sci, Qingdao 266525, Peoples R China 3.Shangqiu Normal Univ, Sch Phys & Elect Informat, Shangqiu 476000, Peoples R China 4.Shandong Management Univ, Dept Intelligent Engn, Jinan 250357, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Long,Wang, Na,Chen, Wen-Cong,et al. A strange star scenario for the formation of eccentric millisecond pulsar PSR J1946+3417[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(9):8.
APA	Jiang, Long.,Wang, Na.,Chen, Wen-Cong.,Liu, Wei-Min.,Leng, Chun-Wei.,...&Qian, Xiang-Li.(2021).A strange star scenario for the formation of eccentric millisecond pulsar PSR J1946+3417.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(9),8.
MLA	Jiang, Long,et al."A strange star scenario for the formation of eccentric millisecond pulsar PSR J1946+3417".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.9(2021):8.