The Peculiar Disk Evolution of 4U 1630-472 Observed by Insight-HXMT During its 2022 and 2023 Outbursts

• Published in: The Astrophysical journal Vol. 975; no. 1; pp. 4 - 15
• Main Authors: Peng, Jing-Qiang, Zhang, Shu, Shui, Qing-Cang, Chen, Yu-Peng, Zhang, Shuang-Nan, Kong, Ling-Da, Santangelo, A., Yu, Zhuo-Li, Ji, Long, Wang, Peng-Ju, Chang, Zhi, Li, Jian, Li, Zhao-sheng
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.11.2024; IOP Publishing
• Subjects: Black holes; Evolution; Low-mass x-ray binary stars; Luminosity; Outbursts; Temperature dependence

We study the spectral properties of the black hole X-ray transient binary 4U 1630–472 during its 2022 and 2023 outbursts with Insight-HXMT observations. We find that the outbursts are in peculiar soft states. The effect of the hardening factor on the disk temperature is taken into account by the ker...