Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT

doi:10.1093/mnras/stz2745

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 硬X射线调制望远镜卫星

	Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT
	Ji, L.; Doroshenko, V; Santangelo, A.; Gungor, C.; Zhang, S.; Ducci, L.; Zhang, S-N; Ge, M-Y; Qu, L. J.; Chen, Y. P.
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2020
卷号	491 期号:2 页码:1851-1856
关键词	stars: magnetic field stars: neutron X-rays: binaries X-rays: individual: 2S 1417-624
ISSN号	0035-8711
DOI	10.1093/mnras/stz2745
文献子类	Article
英文摘要	We present a study of timing properties of the accreting pulsar 2S 1417-624 observed during its 2018 outburst, based on Swift/BAT, Fermi/GBM, Insight-HXMT, and NICER observations. We report a dramatic change of the pulse profiles with luminosity. The morphology of the profile in the range 0.2-10.0 keV switches from double to triple peaks at similar to 2.5 x 10(37)D(10)(2) erg s(-1) and from triple to quadruple peaks at similar to 7x10(37)D(10)(2) erg s(-1). The profile at high energies (25-100 keV) shows significant evolutions as well. We explain this phenomenon according to existing theoretical models. We argue that the first change is related to the transition from the sub to the supercritical accretion regime, while the second to the transition of the accretion disc from the gas-dominated to the radiation pressure-dominated state. Considering the spin-up as well due to the accretion torque, this interpretation allows to estimate the magnetic field self-consistently at similar to 7 x 10(12) G.
电子版国际标准刊号	1365-2966
WOS关键词	MAGNETIZED NEUTRON-STARS ; ACCRETION LUMINOSITY ; RAY
语种	英语
WOS记录号	WOS:000512302100024
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/287871]
专题	硬X射线调制望远镜卫星
推荐引用方式 GB/T 7714	Ji, L.,Doroshenko, V,Santangelo, A.,et al. Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,491(2):1851-1856.
APA	Ji, L..,Doroshenko, V.,Santangelo, A..,Gungor, C..,Zhang, S..,...&Zhu, Y. X..(2020).Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,491(2),1851-1856.
MLA	Ji, L.,et al."Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 491.2(2020):1851-1856.