Modeling the evolution and distribution of the frequency's second derivative and the braking index of pulsar spin

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

	Modeling the evolution and distribution of the frequency's second derivative and the braking index of pulsar spin
	Xie, Y; Zhang SN(张双南); Liao JY(廖进元); Zhang, SN; Liao, JY
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2015
卷号	15 期号:7 页码:963-974
关键词	stars: neutron pulsars: individual (B0329+54) pulsars: general magnetic fields
通讯作者	张双南
英文摘要	We model the evolution of the spin frequency's second derivative nu and the braking index n of radio pulsars with simulations within the phenomenologicalmodel of their surface magnetic field evolution, which contains a long-term power-law decay modulated by short-term oscillations. For the pulsar PSR B0329+54, a model with three oscillation components can reproduce its nu variation. We show that the "averaged" n is different from the instantaneous n, and its oscillation magnitude decreases abruptly as the time span increases, due to the "averaging" effect. The simulated timing residuals agree with the main features of the reported data. Our model predicts that the averaged nu of PSR B0329+54 will start to decrease rapidly with newer data beyond those used in Hobbs et al. We further performMonte Carlo simulations for the distribution of the reported data in vertical bar vertical bar and vertical bar n vertical bar versus characteristic age tau(c) diagrams. It is found that the magnetic field oscillation model with decay index alpha = 0 can reproduce the distributions quite well. Compared with magnetic field decay due to the ambipolar diffusion (alpha = 0.5) and the Hall cascade (alpha = 1.0), the model with no long term decay (alpha = 0) is clearly preferred for old pulsars by the p-values of the two-dimensional Kolmogorov-Smirnov test.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000356868900004
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228388]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Xie, Y,Zhang SN,Liao JY,et al. Modeling the evolution and distribution of the frequency's second derivative and the braking index of pulsar spin[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(7):963-974.
APA	Xie, Y,张双南,廖进元,Zhang, SN,&Liao, JY.(2015).Modeling the evolution and distribution of the frequency's second derivative and the braking index of pulsar spin.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(7),963-974.
MLA	Xie, Y,et al."Modeling the evolution and distribution of the frequency's second derivative and the braking index of pulsar spin".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.7(2015):963-974.