Switches between accretion structures during flares in 4U 1901+03

doi:10.1093/mnras/staa569

IHEP OpenIR > 硬X射线调制望远镜卫星

	Switches between accretion structures during flares in 4U 1901+03
	Ji, L.; Ducci, L.; Santangelo, A.; Zhang, S.; Suleimanov, V; Tsygankov, S.; Doroshenko, V; Nabizadeh, A.; Zhang, S. N.; Ge, M. Y.; Tao, L.; Bu, Q. C.; Qu, J. L.; Lu, F. J.; Chen, L.; Song, L. M.; Li, T. P.; Xu, Y. P.; Cao, X. L.; Chen, Y.; Liu, C. Z.; Cai, C.; Chang, Z.; Chen, G.; Chen, T. X.; Chen, Y. B.; Chen, Y. P.; Cui, W.; Cui, W. W.; Deng, J. K.; Dong, Y. W.; Du, Y. Y.; Fu, M. X.; Gao, G. H.; Gao, H.; Gao, M.; Gu, Y. D.; Guan, J.; Guo, C. C.; Han, D. W.; Huang, Y.; Huo, J.; Jia, S. M.; Jiang, L. H.; Jiang, W. C.; Jin, J.; Jin, Y. J.; Kong, L. D.; Li, B.; Li, C. K.; Li, G.; Li, M. S.; Li, W.; Li, X.; Li, X. B.; Li, X. F.; Li, Y. G.; Li, Z. W.; Liang, X. H.; Liao, J. Y.; Liu, B. S.; Liu, G. Q.; Liu, H. X.; Liu, H. W.; Liu, X. J.; Liu, Y. N.; Lu, B.; Lu, X. F.; Luo, Q.; Luo, T.; Ma, X.; Meng, B.; Nang, Y.; Nie, J. Y.; Ou, G.; Sai, N.; Shang, R. C.; Song, X. Y.; Sun, L.; Tan, Y.; Tuo, Y. L.; Wang, C.; Wang, G. F.; Wang, J.; Wang, P. J.; Wang, W. S.; Wang, Y. S.; Wen, X. Y.; Wu, B. Y.; Wu, B. B.; Wu, M.; Xiao, G. C.; Xiao, S.; Xiong, S. L.; Xu, H.; Yang, J. W.; Yang, S.; Yang, Yan-Ji; Yang, Yi-Jung; Yi, Q. B.; Yin, Q. Q.; You, Y.; Zhang, A. M.; Zhang, C. M.; Zhang, F.; Zhang, H. M.; Zhang, J.; Zhang, P.; Zhang, T.; Zhang, W.; Zhang, W. C.; Zhang, W. Z.; Zhang, Yi; Zhang, Y. F.; Zhang, Y. J.; Zhang, Y. H.; Zhang, Yue; Zhang, Zhao; Zhang, Zhi; Zhang, Z. L.; Zhao, H. S.; Zhao, X. F.; Zheng, S. J.; Zhou, D. K.; Zhou, J. F.; Zhu, Y. X.; Zhu, Y.; Zhuang, R. L.
	2020
Source Publication	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
Volume	493 Issue:4 Pages:5680-5692
Subtype	Article
Abstract	We report on our analysis of the 2019 outburst of the X-ray accreting pulsar 4U 1901+03 observed with Insight-HXMT and NICER. Both spectra and pulse profiles evolve significantly in the decaying phase of the outburst. Dozens of flares are observed throughout the outburst. They are more frequent and brighter at the outburst peak. We find that the flares, which have a duration from tens to hundreds of seconds, are generally brighter than the persistent emission by a factor of similar to 1.5. The pulse-profile shape during the flares can be significantly different from that of the persistent emission. In particular, a phase shift is clearly observed in many cases. We interpret these findings as direct evidence of changes of the pulsed beam pattern, due to transitions between the sub- and supercritical accretion regimes on a short time-scale. We also observe that at comparable luminosities the flares' pulse profiles are rather similar to those of the persistent emission. This indicates that the accretion on the polar cap of the neutron star is mainly determined by the luminosity, i.e. the mass accretion rate.
Keyword	stars: neutron X-rays: binaries X-rays: individual: 4U 1901+03
DOI	10.1093/mnras/staa569
WOS Keyword	RAY PULSAR PROFILES ; LUMINOSITY DEPENDENCE ; GEOMETRY ; BURSTS ; PHASE ; X-4
Indexed By	SCI ; INSPIREHEP
Correlation	相关
Research Direction	科学结果
Member Type	非核心团队
Language	英语
WOS ID	WOS:000539094400082
ADS Bibcode	2020MNRAS.493.5680J
AXRIV CODE	2002
inspireid	1781559
inspireURL	https://inspirehep.net/literature/1781559
ItemNo	IHEP00030723
Citation statistics	Cited Times:2 [INSPIRE] Cited Times:2 [ADS]
Document Type	期刊论文
Identifier	http://ir.ihep.ac.cn/handle/311005/287876
Collection	硬X射线调制望远镜卫星
Recommended Citation GB/T 7714	Ji, L.,Ducci, L.,Santangelo, A.,et al. Switches between accretion structures during flares in 4U 1901+03[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,493(4):5680-5692.
APA	Ji, L..,Ducci, L..,Santangelo, A..,Zhang, S..,Suleimanov, V.,...&Zhuang, R. L..(2020).Switches between accretion structures during flares in 4U 1901+03.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,493(4),5680-5692.
MLA	Ji, L.,et al."Switches between accretion structures during flares in 4U 1901+03".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 493.4(2020):5680-5692.

Files in This Item:
File Name/Size	DocType	Version	Access	License
IHEP00030723.pdf（1465KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	Application Full Text

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

硬X射线调制望远镜卫星知识库