Evolutions of magnetic field and spin-down of pulsars

doi:10.1063/1.5117823

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	Evolutions of magnetic field and spin-down of pulsars
	Gao, Zhi-Fu1,2 ; Shan, Hao1 ; Wang, Hui3 ; Wang, Na1
	2019-07-17
Conference Name	AIP Conference Proceedings
Source Publication	AIP Conference Proceedings
Volume	2127
Issue	1
Pages	020033
Conference Date	JAN 03-07, 2019
Conference Place	Xiamen, PEOPLES R CHINA
Country	China
Publisher	AMER INST PHYSICS, 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
Contribution Rank	1
Abstract	Here we summarized our recent work on evolutions of magnetic field and spin-down of neutron stars. Our work includes the following three parts: (1) Based on the estimated ages of their potentially associated supernova remnants (SNRs), we estimate the values of the mean braking indices of eight magnetars with SNRs, and find that live magnetars have smaller mean braking indices of 1 < n < 3, and we interpret them within a combination of magneto-dipole radiation and wind-aided braking. The larger mean braking indices of n > 3 for the other three magnetars are attributed to the magnetic field decay; (2) By introducing a mean rotation energy conversion coefficient, and combining the pulsar's high-energy and timing observations with a reliable nuclear equation of state, we estimate the initial spin period, initial dipole magnetic field and true age PSR J1640-4631, The measured braking index of n = 3.15(3) for PSR J1640-4631 is attributed to its long-term dipole magnetic field decay and a low magnetic field decay rate; (3) The low braking index of n = 0.9(2) for PSR H734-3333 could undergo a supercritical accretion soon after its formation in a supernova explosion. The buried multipole magnetic fields will merger into a dipole magnetic field. Keeping the current field-growth index epsilon = 1.34, this pulsar will become a magnetar with dB(p) similar to 6.2(2) x 10(14) G and dB(p) similar to 1.06(4) x 10(15) G after next 50 kyrs and 100 kys, respectively.
DOI	10.1063/1.5117823
URL	查看原文
Indexed By	CPCI
Language	英语
ISBN	978-0-7354-1869-1
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
ISSN	0094-243X
WOS ID	WOS:000507575500033
Citation statistics
Document Type	会议论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/3907
Collection	射电天文研究室_脉冲星研究团组
Affiliation	1.Xinjiang􀀁Astronomical􀀁Observatory,􀀁Chinese􀀁Academy􀀁of􀀁Sciences,􀀁150,􀀁Science􀀁1-Street,􀀁Urumqi,􀀁Xinjiang,􀀁830011,􀀁China; 2.Key􀀁Laboratory􀀁of􀀁Radio􀀁Astronomy,􀀁Chinese􀀁Academy􀀁of􀀁Sciences,􀀁West􀀁Beijing􀀁Road,􀀁Nanjing,􀀁Jiangsu􀀁210008,􀀁China; 3.School􀀁of􀀁Physical􀀁Science􀀁and􀀁Technology,􀀁Southwest􀀁Jiaotong􀀁University,Chengdu􀀁610031,􀀁China
Recommended Citation GB/T 7714	Gao, Zhi-Fu,Shan, Hao,Wang, Hui,et al. Evolutions of magnetic field and spin-down of pulsars[C]:AMER INST PHYSICS, 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA,2019:020033.

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