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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 1.

Left panels: detection field and host galaxy of ZTF 18aaqeasu. The top panel is an archival Sloan Digital Sky Survey (SDSS) image of the region, while the lower panel shows an image taken with Wafer Scale Imager for Prime (WASP) on P200. The location of the transient is marked with the white circle—it is at a projected offset of ≈17.″2, corresponding to a physical projected distance of 21.9 kpc at the host galaxy redshift. Right panel: multi-color light curves of ZTF 18aaqeasu. The inverted triangles are upper limits. The epochs of spectroscopy are marked with “S” on the top axis. The data used to create this figure are available.

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