Wang,Ling-Jun1; Han,Yan-Hui1; Xu,Dong1; Wang,Shan-Qin2,3; Dai,Zi-Gao2,3; Wu,Xue-Feng4,5; Wei,Jian-Yan1
Source PublicationThe Astrophysical Journal
AbstractABSTRACT Broad-lined Type Ic supernovae (SNe Ic-BL) are of great importance because their association with long-duration gamma-ray bursts (LGRBs) holds the key to deciphering the central engine of LGRBs, which refrains from being unveiled despite decades of investigation. Among the two popularly hypothesized types of central engine, i.e., black holes and strongly magnetized neutron stars (magnetars), there is mounting evidence that the central engine of GRB-associated SNe (GRB-SNe) is rapidly rotating magnetars. Theoretical analysis also suggests that magnetars could be the central engine of SNe Ic-BL. What puzzled the researchers is the fact that light-curve modeling indicates that as much as of 56Ni was synthesized during the explosion of the SNe Ic-BL, which is unfortunately in direct conflict with current state-of-the-art understanding of magnetar-powered 56Ni synthesis. Here we propose a dynamic model of magnetar-powered SNe to take into account the acceleration of the ejecta by the magnetar, as well as the thermalization of the injected energy. Assuming that the SN kinetic energy comes exclusively from the magnetar acceleration, we find that although a major fraction of the rotational energy of the magnetar is to accelerate the SN ejecta, a tiny fraction of this energy deposited as thermal energy of the ejecta is enough to reduce the needed 56Ni to 0.06?M⊙ for both SN 1997ef and SN 2007ru. We therefore suggest that magnetars could power SNe Ic-BL in aspects both of energetics and of 56Ni synthesis.
Keywordstars: neutron supernovae: general supernovae: individual (SN 1997ef, SN 2007ru)
WOS IDIOP:0004-637X-831-1-41
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;,
2.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China;
3.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
4.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China
5.Joint Center for Particle Nuclear Physics and Cosmology of Purple Mountain Observatory-Nanjing University, Chinese Academy of Sciences, Nanjing 210008, China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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Wang,Ling-Jun,Han,Yan-Hui,Xu,Dong,et al. SOLVING THE 56Ni PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE[J]. The Astrophysical Journal,2016,831(1).
APA Wang,Ling-Jun.,Han,Yan-Hui.,Xu,Dong.,Wang,Shan-Qin.,Dai,Zi-Gao.,...&Wei,Jian-Yan.(2016).SOLVING THE 56Ni PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE.The Astrophysical Journal,831(1).
MLA Wang,Ling-Jun,et al."SOLVING THE 56Ni PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE".The Astrophysical Journal 831.1(2016).
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