KMS of Xinjiang Astronomical Observatory, CAS
| Hard X-ray Emission along the Z Track in GX 17+2 | |
Ding, G. Q. ; Huang, C. P.
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| 2015-09-01 | |
| Source Publication | JOURNAL OF ASTROPHYSICS AND ASTRONOMY
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| Volume | 36Issue:3Pages:335-353 |
| Contribution Rank | 1 |
| Abstract | Using the data from the Proportional Counter Array (PCA) and the High-Energy X-ray Timing Experiment (HEXTE) on board Rossi X-Ray Timing Explorer for Z source GX 17 + 2, we investigate the evolution of its PCA spectra and HEXTE spectra along a 'Z' track on its hardness-intensity diagram. A hard X-ray tail is detected in the HEXTE spectra. The detected hard X-ray tails are discontinuously scattered throughout the Z track. The found hard X-ray tail hardens from the horizontal branch, through the normal branch, to the flaring branch in principle and it contributes (20-50)% of the total flux in 20-200 keV. Our joint fitting results of the PCA + HEXTE spectra in 3-200 keV show that the portion of Comptonization in the Bulk-Motion Comptonization (BMC) model accounts for the hard X-ray tail, which indicates that the BMC process could be responsible for the detected hard tail. The temperature of the seed photons for BMC is 2.7 keV, implying that these seed photons might be emitted from the surface of the neutron star (NS) or the boundary layer between the NS and the disk and, therefore, this process could take place around the NS or in the boundary layer. |
| Keyword | Accretion: Accretion Disks X-rays: Binaries Stars: Individual (Gx 17+2) Stars: Neutron |
| Subtype | Article |
| DOI | 10.1007/s12036-015-9340-2 |
| WOS Headings | Science & Technology ; Physical Sciences |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | ACCRETING BLACK-HOLES ; BROAD-BAND SPECTRUM ; COLOR-COLOR DIAGRAM ; CIRCINUS X-1 ; SCORPIUS X-1 ; CYGNUS X-2 ; OBSERVATIONAL EVIDENCE ; BEPPOSAX OBSERVATIONS ; RXTE OBSERVATIONS ; ENERGY-SPECTRA |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000361891800001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/889 |
| Collection | 已撤销研究室/团组_高能天体物理研究团组 |
| Corresponding Author | Ding, G. Q. |
| Affiliation | Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Ding, G. Q.,Huang, C. P.. Hard X-ray Emission along the Z Track in GX 17+2[J]. JOURNAL OF ASTROPHYSICS AND ASTRONOMY,2015,36(3):335-353. |
| APA | Ding, G. Q.,&Huang, C. P..(2015).Hard X-ray Emission along the Z Track in GX 17+2.JOURNAL OF ASTROPHYSICS AND ASTRONOMY,36(3),335-353. |
| MLA | Ding, G. Q.,et al."Hard X-ray Emission along the Z Track in GX 17+2".JOURNAL OF ASTROPHYSICS AND ASTRONOMY 36.3(2015):335-353. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Hard X-ray Emission （1129KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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