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ZTF 18aaqeasu (SN2018byg): A Massive Helium-shell Double Detonation on a Sub-Chandrasekhar-mass White Dwarf

  • Authors: Kishalay De, Mansi M. Kasliwal, Abigail Polin, Peter E. Nugent, Lars Bildsten, Scott M. Adams, Eric C. Bellm, Nadia Blagorodnova, Kevin B. Burdge, Christopher Cannella, S. Bradley Cenko, Richard G. Dekany, Michael Feeney, David Hale, U. Christoffer Fremling, Matthew J. Graham, Anna Y. Q. Ho, Jacob E. Jencson, S. R. Kulkarni, Russ R. Laher, Frank J. Masci, Adam A. Miller, Maria T. Patterson, Umaa Rebbapragada, Reed L. Riddle, David L. Shupe, and Roger M. Smith

2019 The Astrophysical Journal Letters 873 L18.

  • Provider: AAS Journals

Caption: Figure 6.

Comparison of the spectra of ZTF 18aaqeasu at and before peak light (shown as black lines) to models of He shell double detonations from Kromer et al. (2010; the left panels are for the two models shown in the light curve comparison) and Polin et al. (2019; the right panels are for two cases of ejecta mixing with the best-fit WD and shell mass from the light curves). In both panels, the epochs of spectroscopic comparison are indicated according to the phase of the light curve (days from r-band peak), and the model spectra have the same color scheme as in Figure 5.

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