KMS of Xinjiang Astronomical Observatory, CAS
| Insight-HXMT Detections of Hard X-Ray Tails in Scorpius X-1 | |
Ding, G. Q.1,2 ; Qu, J. L.3; Song, L. M.3; Huang, Y.3; Zhang, S.3; Bu, Q. C.4; Ge, M. Y.3; Li, X. B.3; Tao, L.3; Ma, X.3; Chen, Y. P.3; Zhang, L.3; Yan, W. M.1,2; Tuo, Y. L.3; Fu, Y. C.1,2; Xiao, S. H.1,2; Yang, Z. X.3; Liu, H. X.3
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| 2023-06-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 950Issue:1Pages:69 |
| Contribution Rank | 1 |
| Abstract | Using the observations of the high-energy detector of the Hard X-ray Modulation Telescope (Insight-HXMT) for Scorpius X-1 from 2017 to 2020, we search for hard X-ray tails in the X-ray spectra in similar to 30-200 keV. The hard X-ray tails are found throughout the Z-track on the hardness-intensity diagram, and the detected hard X-ray tails become hard and weak from the horizontal branch (HB), through the normal branch (NB), to the flaring branch (FB). Comparing the hard X-ray spectra of Insight-HXMT between Cyg X-1 and Sco X-1, it is concluded that the hard X-ray spectrum of Cyg X-1 shows a high-energy cutoff, implying a hot corona in it, but the high-energy cutoff is not seen in the hard X-ray spectrum of Sco X-1. From fitting the broadband spectrum of Sco X-1 in similar to 2-200 keV, it is proposed that the hard X-ray tails in the HB and NB can be explained by the overall Comptonization COMPTB model, suggesting that the hard X-ray tails could have resulted from the Comptonization of the photons from the neutron star (NS) surface by the thermal electrons in the region between the NS and the disk and the energetic electrons in the freefall toward the NS in the converging flow onto the NS. However, this model cannot be responsible for the hard X-ray tails in the FB. Further study on the FB hard X-ray tails is needed. |
| DOI | 10.3847/1538-4357/accf91 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | BROAD-BAND SPECTRUM ; K LINE EMISSION ; BLACK-HOLE ; BEPPOSAX OBSERVATIONS ; ACCRETION DISKS ; INNER DISK ; CYGNUS X-2 ; COMPTONIZATION MODELS ; ENERGY-SPECTRA ; NEUTRON-STARS |
| Funding Project | Open Program of the Key Laboratory of Xinjiang Uygur Autonomous Region of China[2020D04049] ; Natural Science Foundation of China[U1838108] ; Natural Science Foundation of China[12273100] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001003950300001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | Open Program of the Key Laboratory of Xinjiang Uygur Autonomous Region of China ; Natural Science Foundation of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5268 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Ding, G. Q. |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150, ci 1-St, Urumqi 830011, Xinjiang, Peoples R China 2.Xinjiang Key Lab Radio Astrophys, 150,Sci 1-St, Urumqi 830011, Xinjiang, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 4.Eberhard Karls Univ Tubingen, Inst Astron & Astrophys, Kepler Ctr Astro & Particle Phys, Sand 1, D-72076 Tubingen, Germany |
| Recommended Citation GB/T 7714 | Ding, G. Q.,Qu, J. L.,Song, L. M.,et al. Insight-HXMT Detections of Hard X-Ray Tails in Scorpius X-1[J]. ASTROPHYSICAL JOURNAL,2023,950(1):69. |
| APA | Ding, G. Q..,Qu, J. L..,Song, L. M..,Huang, Y..,Zhang, S..,...&Liu, H. X..(2023).Insight-HXMT Detections of Hard X-Ray Tails in Scorpius X-1.ASTROPHYSICAL JOURNAL,950(1),69. |
| MLA | Ding, G. Q.,et al."Insight-HXMT Detections of Hard X-Ray Tails in Scorpius X-1".ASTROPHYSICAL JOURNAL 950.1(2023):69. |
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| Ding-2023-Insight-HX（1532KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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