Return of 4U 1730–22 after 49 yr Silence: The Outburst Properties Observed by NICER and Insight-HXMT

After 49 yr of quiescence, 4U 1730–22 became active and had two outbursts in 2021 and 2022; the onset and tail of the outbursts were observed by NICER, which give us a peerless opportunity to study the state transition and its underlying mechanism. In this work, we take both the neutron star (NS) su...

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Bibliographic Details

Published in:	The Astrophysical Journal Letters
Main Authors:	Yu-Peng Chen, Shu Zhang, Shuang-Nan Zhang, Long Ji, Peng-Ju Wang, Ling-Da Kong, Zhi Chang, Jing-Qiang Peng, Qing-Cang Shui, Jian Li, Lian Tao, Ming-Yu Ge, Jin-Lu Qu
Format:	Article
Language:	English
Published:	IOP Publishing 2022-01-01
Subjects:	X-ray transient sources Low-mass x-ray binary stars
Online Access:	https://doi.org/10.3847/2041-8213/aca76a