The Study of the Physical Properties and Energy Sources of Five Luminous Type Ibc Supernovae  

作　　者：白松瑶 王涛 王善钦 甘文沛 王浏毅 梁恩维 Song-Yao Bai;Tao Wang;Shan-Qin Wang;Wen-Pei Gan;Liu-Yi Wang;En-Wei Liang(Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China;Nanjing Institute of Astronomical Optics&Technology,Nanjing 210042,China)

机构地区：[1]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [2]Nanjing Institute of Astronomical Optics&Technology,Nanjing 210042,China

出　　处：《Research in Astronomy and Astrophysics》2023年第12期34-56,共23页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(grant Nos.11963001,12133003,11833003,11973020(C0035736),U1938201)。

摘　　要：In this paper,we study five luminous supernovae(LSNe)Ibc(SN 2009ca,ASASSN-15mj,SN 2019omd,SN 2002ued,and SN 2021bmf)whose peak absolute magnitudes M_(peakare)≈-19.5 to-21 mag by fitting their multi-band light curves(LCs)with different energy source models.We find that SN 2009ca might be powered by the^(56)Ni model since the required^(56)Ni mass(0.56 M_(⊙))is comparable to those of energetic SNe Ic,while the rest four SNe cannot be accounted for the^(56)Ni model since their derived^(56)Ni masses are(?)1 M_(⊙)or the ratios of the^(56)Ni mass to the ejecta mass are larger than 0.2.This indicates that some LSNe might be powered by^(56)Ni decay,while most of them need additional energy sources.We then use the magnetar plus^(56)Ni model and the fallback plus^(56)Ni model to fit the LCs of the four LSNe that cannot be explained by the^(56)Ni model,finding that the two models can account for the four SNe,and the derived parameters are comparable to those of LSNe or superluminous SNe in the literature,if they were(mainly)powered by magnetars or fallback.We suggest that the magnetar plus^(56)Ni model is more reasonable than the fallback plus^(56)Ni model,since the validity of the fallback plus^(56)Ni model depends on the value of accretion efficiency(η)and favors a largeηvalue,and the magnetar plus^(56)Ni model yields smallerχ^(2)/dof values.It should be pointed out that,however,the fallback plus^(56)Ni model is still a promising model that can account for the four SNe in our sample as well as other LSNe.

关 键 词：Stars-(stars:)supernovae general-stars MAGNETARS 

分 类 号：P145.3[天文地球—天体物理]