HARD X-RAY EMISSION AND Ti-44 LINE FEATURES OF THE TYCHO SUPERNOVA REMNANT
Wang, Wei1; Li, Zhuo2,3; Wang, W (reprint author), Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-07-10
卷号789期号:2
DOI10.1088/0004-637X/789/2/123
收录类别SCI
关键词Cosmic Rays Gamma Rays: Ism Ism: Supernova Remnants Supernovae: Individual (Tycho)
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.
项目资助者NSFC(11073030,11273005) ; SRFDP(20120001110064) ; CAS Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects ; National Basic Research Program (973 Program) of China(2014CB845800)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000338674900032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CHANDRASEKHAR MASS MODELS ; DELAYED-DETONATION MODELS ; GALACTIC SUPERNOVA ; IA SUPERNOVAE ; SN 1572 ; NUCLEOSYNTHESIS ; ACCELERATION ; SHOCK ; CASSIOPEIA ; SEARCH
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9442
专题中国科学院天体结构与演化重点实验室
通讯作者Wang, W (reprint author), Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China.
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
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Wang, Wei,Li, Zhuo,Wang, W . 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,&Wang, W .(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).
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