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SOLVING THE Ni-56 PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE
Wang, Ling-Jun; Han, Yan-Hui; Xu, Dong; Wang, Shan-Qin; Dai, Zi-Gao; Wu, Xue-Feng; Wei, Jian-Yan
2016
Source PublicationASTROPHYSICAL JOURNAL
Volume831Issue:1Pages:41
AbstractBroad-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 0.2-0.5 M-circle dot of Ni-56 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 Ni-56 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 Ni-56 to 0.06M(circle dot) for both SN 1997ef and SN 2007ru. We therefore suggest that magnetars could power SNe Ic-BL in aspects both of energetics and of Ni-56 synthesis.
WOS IDWOS:000387229300004
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16858
Collection南极天文中心
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GB/T 7714
Wang, Ling-Jun,Han, Yan-Hui,Xu, Dong,et al. SOLVING THE Ni-56 PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE[J]. ASTROPHYSICAL JOURNAL,2016,831(1):41.
APA Wang, Ling-Jun.,Han, Yan-Hui.,Xu, Dong.,Wang, Shan-Qin.,Dai, Zi-Gao.,...&Wei, Jian-Yan.(2016).SOLVING THE Ni-56 PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE.ASTROPHYSICAL JOURNAL,831(1),41.
MLA Wang, Ling-Jun,et al."SOLVING THE Ni-56 PUZZLE OF MAGNETAR-POWERED BROAD-LINED TYPE IC SUPERNOVAE".ASTROPHYSICAL JOURNAL 831.1(2016):41.
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