HARD X-RAY EMISSION AND Ti-44 LINE FEATURES OF THE TYCHO SUPERNOVA REMNANT
文献类型：期刊论文
| 作者 | Wang, Wei1; Li, Zhuo2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014-07-10 |
| 卷号 | 789期号:2 |
| 关键词 | cosmic rays gamma rays: ISM ISM: supernova remnants supernovae: individual (Tycho) |
| ISSN号 | 0004-637X |
| 通讯作者 | Wang, W (reprint author), Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China. |
| 英文摘要 | A deep hard X-ray survey of the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has detected for the first time non-thermal emission up to 90 keV in the Tycho supernova (SN) remnant. Its 3-100 keV spectrum is fitted with a thermal bremsstrahlung of kT similar to 0.81 +/- 0.45 keV plus a power-law model of Gamma similar to 3.01 +/- 0.16. Based on diffusive shock acceleration theory, this non-thermal emission, together with radio measurements, implies that the Tycho remnant may not accelerate protons up to >PeV but to hundreds TeV. Only heavier nuclei may be accelerated to the cosmic ray spectral "knee." In addition, using INTEGRAL, we search for soft gamma-ray lines at 67.9 and 78.4 keV that come from the decay of radioactive Ti-44 in the Tycho remnant. A bump feature in the 60-90 keV energy band, potentially associated with the Ti-44 line emission, is found with a marginal significance level of similar to 2.6 sigma. The corresponding 3 sigma upper limit on the Ti-44 line flux amounts to 1.5 x 10(-5) photon cm(-2) s(-1). Implications on the progenitor of the Tycho SN, considered to be a Type Ia SN prototype, are discussed. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | CHANDRASEKHAR MASS MODELS ; DELAYED-DETONATION MODELS ; GALACTIC SUPERNOVA ; IA SUPERNOVAE ; SN 1572 ; NUCLEOSYNTHESIS ; ACCELERATION ; SHOCK ; CASSIOPEIA ; SEARCH |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/789/2/123/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000338674900032 |
| 公开日期 | 2016-06-01 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9442]  |
| 专题 | 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China 2.Department of Astronomy and Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Wang, Wei,Li, Zhuo. HARD X-RAY EMISSION AND Ti-44 LINE FEATURES OF THE TYCHO SUPERNOVA REMNANT[J]. ASTROPHYSICAL JOURNAL,2014,789(2). |
| APA | Wang, Wei,&Li, Zhuo.(2014).HARD X-RAY EMISSION AND Ti-44 LINE FEATURES OF THE TYCHO SUPERNOVA REMNANT.ASTROPHYSICAL JOURNAL,789(2). |
| MLA | Wang, Wei,et al."HARD X-RAY EMISSION AND Ti-44 LINE FEATURES OF THE TYCHO SUPERNOVA REMNANT".ASTROPHYSICAL JOURNAL 789.2(2014). |
入库方式： OAI收割
来源：云南天文台
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