Timing analysis of the black hole candidate EXO 1846-031 with Insight-HXMT monitoring

• Published in: arXiv.org
• Main Authors: He-Xin, Liu, Huang, Yue, Guang-Cheng, Xiao, Qing-Cui Bu, Jin-Lu, Qu, Zhang, Shuang-Nan, Shu-Mei Jia, Fang-Jun, Lu, Ma, Xiang, Lian Tao, Zhang, Wei, Chen, Li, Li-Ming, Song, Ti-Pei Li, Yu-Peng, Xu, Xue-Lei, Cao, Chen, Yong, Cai, Ce, Chang, Zhi, Chen, Gang, Tian-Xiang, Chen, Yi-Bao, Chen, Yu-Peng, Chen, Cui, Wei, Wei-Wei, Cui, Jing-Kang, Deng, Yong-Wei, Dong, Min-Xue, Fu, Guan-Hua, Gao, Gao, He, Gao, Min, Ming-Yu, Ge, Yu-Dong, Gu, Cheng-Cheng, Guo, Da-Wei, Han, Huo, Jia, Lu-Hua, Jiang, Wei-Chun, Jiang, Jin, Jing, Yong-Jie, Jin, Ling-Da Kong, Li, Bing, Cheng-Kui, Li, Li, Gang, Mao-Shun, Li, Li, Wei, Li, Xian, Xiao-Bo, Li, Xu-Fang, Li, Yang-Guo, Li, Zheng-Wei, Li, Jing-Yuan Liao, Bai-Sheng, Liu, Guo-Qing, Liu, Xiao-Jing, Liu, Yi-Nong Liu, Lu, Bo, Xue-Feng, Lu, Luo, Tao, Jian-Yin Nie, Ou, Ge, Na Sai, Ren-Cheng, Shang, Xin-Ying, Song, Sun, Liang, Tan, Ying, You-Li, Tuo, Wang, Chen, Guo-Feng, Wang, Ling-Jun, Wang, Yu-Sa, Wang, Bo-Bing, Wu, Wu, Mei, Xiao, Shuo, Jia-Wei, Yang, Yang, Sheng, Yan-Ji, Yang, Yi-Jung, Yang, Qi-Bin, Yi, Qian-Qing, Yin, You, Yuan, Ai-Mei, Zhang, Cheng-Mo, Zhang, Zhang, Fan, Hong-Mei, Zhang, Zhang, Juan, Zhang, Tong, Wen-Zhao, Zhang, Yi-Zhang, Yong-Jie, Zhang, Yuan-Hang, Zhang, Zhang, Yue, Zhang, Zhao, Zi-Liang, Zhang, Hai-Sheng Zhao, Xiao-Fan, Zhao, Shi-Jie, Zheng, Yao-Guang Zheng, Yu-Xuan, Zhu, Ren-Lin, Zhuang
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 24.09.2020
• Subjects: Black holes; Energy bands; Inclination; Physics - High Energy Astrophysical Phenomena; Quasi-Periodic Oscillations
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2009.10956

We present the observational results from a detailed timing analysis of the black hole candidate EXO 1846-031 during its outburst in 2019 with the observations of Insight-HXMT, NICER and MAXI. This outburst can be classfied roughly into four different states. Type-C quasi-periodic oscillations (QPOs) observed by NICER (about 0.1-6Hz) and Insight-HXMT (about 0.7-8Hz) are also reported in this work. Meanwhile, we study various physical quantities related to QPO frequency.The QPO rms-frequency relationship in three energy band 1-10 keV indicates that there is a turning pointing in frequency around 2 Hz,which is similar to that of GRS 1915+105. A possible hypothesis for the relationship above may be related to the inclination of the source, which may require a high inclination to explain it. The relationships between QPO frequency and QPO rms,hardness,total fractional rms and count rate have also been found in other transient sources, which can indicate that the origin of type-C QPOs is non-thermal.