Modeling The Most Luminous Supernova Associated with a Gamma-Ray Burst, SN 2011kl

DOI: 
10.3847/1538-4357/aa95c5
Publication date: 
01/12/2017
Main author: 
Wang, Shan-Qin
IAA authors: 
Cano, Zach
Authors: 
Wang, Shan-Qin;Cano, Zach;Wang, Ling-Jun;Zheng, WeiKang;Dai, Zi-Gao;Filippenko, Alexei V.;Liu, Liang-Duan
Journal: 
The Astrophysical Journal
Refereed: 
Yes
Publication type: 
Article
Volume: 
850
Pages: 
148
Abstract: 

We study the most luminous known supernova (SN) associated with a gamma-ray burst (GRB), SN 2011kl. The photospheric velocity of SN 2011kl around peak brightness is 21,000 ± 7000 km s<SUP>−1</SUP>. Owing to different assumptions related to the light-curve (LC) evolution (broken or unbroken power-law function) of the optical afterglow of GRB 111209A, different techniques for the LC decomposition, and different methods (with or without a near-infrared contribution), three groups derived three different bolometric LCs for SN 2011kl. Previous studies have shown that the LCs without an early-time excess preferred a magnetar model, a magnetar+<SUP>56</SUP>Ni model, or a white dwarf tidal disruption event model rather than the radioactive heating model. On the other hand, the LC shows an early-time excess and dip that cannot be reproduced by the aforementioned models, and hence the blue-supergiant model was proposed to explain it. Here, we reinvestigate the energy sources powering SN 2011kl. We find that the two LCs without the early-time excess of SN 2011kl can be explained by the magnetar+<SUP>56</SUP>Ni model, and the LC showing the early excess can be explained by the magnetar+<SUP>56</SUP>Ni model taking into account the cooling emission from the shock-heated envelope of the SN progenitor, demonstrating that this SN might primarily be powered by a nascent magnetar.

Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037741065&doi=10.3847%2f1538-4357%2faa95c5&partnerID=40&md5=e2a824ace2a005f873f15f911a6a11f7
ADS Bibcode: 
2017ApJ...850..148W
Keywords: 
stars: magnetars;supernovae: general;supernovae: individual: SN 2011kl