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HARD X-RAY EMISSION AND Ti-44 LINE FEATURES OF THE TYCHO SUPERNOVA REMNANT
Wang, Wei1; Li, Zhuo2,3
Source PublicationASTROPHYSICAL JOURNAL
2014-07-10
Volume789Issue:2
DOI10.1088/0004-637X/789/2/123
Indexed BySCI
KeywordCosmic Rays Gamma Rays: Ism Ism: Supernova Remnants Supernovae: Individual (Tycho)
Abstract

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.

Funding ProjectNSFC[11073030] ; NSFC[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]
Funding OrganizationNSFC[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]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000338674900032
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCHANDRASEKHAR MASS MODELS ; DELAYED-DETONATION MODELS ; GALACTIC SUPERNOVA ; IA SUPERNOVAE ; SN 1572 ; NUCLEOSYNTHESIS ; ACCELERATION ; SHOCK ; CASSIOPEIA ; SEARCH
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9442
Collection中国科学院天体结构与演化重点实验室
Affiliation1.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
Recommended Citation
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).
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