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Disc versus wind accretion in X-ray pulsar GX 301-2
Liu, Jiren; Ji, Long; Jenke, Peter A.; Doroshenko, Victor; Liao, Zhenxuan; Li, Xiaobo; Zhang, Shuangnan; Orlandini, Mauro; Ge, Mingyu; Zhang, Shu; Santangelo, Andrea
2021
Source PublicationMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume504Pages:2493
AbstractGX 301-2 provides a rare opportunity to study both disc and wind accretion in a same target. We report Insight-Hard X-ray Modulation Telescope observations of the spin-up event of GX 301-2 that happened in 2019 and compare with those of wind-fed state. The pulse profiles of the initial rapid spin-up period are dominated by one main peak, while those of the later slow spin-up period are composed of two similar peaks, as those of wind-fed state. These behaviours are confirmed by Fermi/Gamma-ray Burst Monitor data, which also show that during the rapid spin-up period, the main peak increases with luminosity up to 8 × 1037 erg s-1, but the faint peak remains almost constant. The absorption column densities during the spin-up period are ∼1.5 × 1023 cm-2, much less than those of wind-fed state at similar luminosity (∼9 × 1023 cm-2), supporting the scenario that most of material is condensed into a disc during the spin-up period. We discuss possible differences between disc and wind accretion that may explain the observed different trends of pulse profiles.
DOI10.1093/mnras/stab938
WOS IDWOS:000659453800064
ADS Bibcode2021MNRAS.504.2493L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2021MNRAS.504.2493L
Citation statistics
Cited Times:1 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/289766
Collection粒子天体物理中心
硬X射线调制望远镜卫星
Recommended Citation
GB/T 7714
Liu, Jiren,Ji, Long,Jenke, Peter A.,et al. Disc versus wind accretion in X-ray pulsar GX 301-2[J]. Monthly Notices of the Royal Astronomical Society,2021,504:2493.
APA Liu, Jiren.,Ji, Long.,Jenke, Peter A..,Doroshenko, Victor.,Liao, Zhenxuan.,...&Santangelo, Andrea.(2021).Disc versus wind accretion in X-ray pulsar GX 301-2.Monthly Notices of the Royal Astronomical Society,504,2493.
MLA Liu, Jiren,et al."Disc versus wind accretion in X-ray pulsar GX 301-2".Monthly Notices of the Royal Astronomical Society 504(2021):2493.
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