@article{91943be4c7a343c5ae103024885162e2,
title = "Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve",
abstract = "We present early observations and analysis of the double-peaked Type IIb supernova (SN IIb) SN 2021zby. TESS captured the prominent early shock-cooling peak of SN 2021zby within the first ∼10 days after explosion with a 30 minute cadence. We present optical and near-infrared spectral series of SN 2021zby, including three spectra during the shock-cooling phase. Using a multiband model fit, we find that the inferred properties of its progenitor are consistent with a red supergiant or yellow supergiant, with an envelope mass of ∼0.30-0.65 M ⊙ and an envelope radius of ∼120-300 R ⊙. These inferred progenitor properties are similar to those of other SNe IIb with a double-peaked feature, such as SNe 1993J, 2011dh, 2016gkg, and 2017jgh. This study further validates the importance of the high cadence and early coverage in resolving the shape of the shock-cooling light curve, while the multiband observations, particularly UV, are also necessary to fully constrain the progenitor properties.",
author = "Qinan Wang and Patrick Armstrong and Yossef Zenati and Ryan Ridden-Harper and Armin Rest and Iair Arcavi and Kilpatrick, \{Charles D.\} and Foley, \{Ryan J.\} and Tucker, \{Brad E.\} and Chris Lidman and Killestein, \{Thomas L.\} and Melissa Shahbandeh and Anderson, \{Joseph P.\} and Rodrigo Angulo and Chris Ashall and Jamison Burke and Chen, \{Ting Wan\} and \{von Coelln\}, Sophie and Dalrymple, \{Kyle A.\} and Davis, \{Kyle W.\} and Fulton, \{Michael D.\} and Llu{\'i}s Galbany and Gonzalez, \{Estefania Padilla\} and Bore Gao and Mariusz Gromadzki and Howell, \{D. Andrew\} and Nada Ihanec and Jencson, \{Jacob E.\} and Jones, \{David O.\} and Lyman, \{Joseph D.\} and Curtis McCully and M{\"u}ller-Bravo, \{Tom{\'a}s E.\} and Megan Newsome and Matt Nicholl and David O{\textquoteright}Neill and Craig Pellegrino and Sofia Rest and Smartt, \{Stephen J.\} and Ken Smith and Shubham Srivastav and Giacomo Terreran and Samaporn Tinyanont and Young, \{David R.\} and Alfredo Zenteno",
note = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",
year = "2023",
month = feb,
day = "1",
doi = "10.3847/2041-8213/acb0d0",
language = "الإنجليزيّة",
volume = "943",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "American Astronomical Society",
number = "2",
}