Figure 9 from Evidence for Late-stage Eruptive Mass Loss in the Progenitor to SN2018gep, a Broad-lined Ic Supernova: Pre-explosion Emission and a Rapidly Rising Luminous Transient

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Evidence for Late-stage Eruptive Mass Loss in the Progenitor to SN2018gep, a Broad-lined Ic Supernova: Pre-explosion Emission and a Rapidly Rising Luminous Transient

Authors: Anna Y.Q. Ho, Daniel A. Goldstein, Steve Schulze, David K. Khatami, Daniel A. Perley, Mattias Ergon, Avishay Gal-Yam, Alessandra Corsi, Igor Andreoni, Cristina Barbarino, Eric C. Bellm, Nadia Blagorodnova, Joe S. Bright, E. Burns, S. Bradley Cenko, Virginia Cunningham, Kishalay De, Richard Dekany, Alison Dugas, Rob P. Fender, Claes Fransson, Christoffer Fremling, Adam Goldstein, Matthew J. Graham, David Hale, Assaf Horesh, Tiara Hung, Mansi M. Kasliwal, N. Paul M. Kuin, S.R. Kulkarni, Thomas Kupfer, Ragnhild Lunnan, Frank J. Masci, Chow-Choong Ngeow, Peter E. Nugent, Eran O. Ofek, Maria T. Patterson, Glen Petitpas, Ben Rusholme, Hanna Sai, Itai Sfaradi, David L. Shupe, Jesper Sollerman, Maayane T. Soumagnac, Yutaro Tachibana, Francesco Taddia, Richard Walters, Xiaofeng Wang, Yuhan Yao, and Xinhan Zhang

2019 The Astrophysical Journal 887 169.

Provider: AAS Journals

Caption: Figure 9.

Evolution of blackbody properties (luminosity, radius, temperature) over time compared to the Ic-BL SN iPTF16asu and the fast–luminous optical transient AT2018cow. The light gray circles are derived from optical data only. The outlined circles are derived from UV and optical data. Middle panel: dotted line shows ﹩v=0.1c﹩. Note that ﹩R\ne 0﹩ at t₀, and instead ﹩R(t=0)=3\,\times \,{10}^{14}\,\mathrm{cm}﹩. Due to the scaling of our plot we do not show the radius evolution of AT2018cow, which drops from ﹩8\times {10}^{14}\,\mathrm{cm}﹩ to ﹩{10}^{14}\,\mathrm{cm}﹩ on this timescale. Bottom panel: dotted horizontal line shows 5000 K, the recombination temperature for carbon and oxygen. Once this temperature is reached, the photosphere flattens out (and potentially begins to recede).

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