Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve

February 2023 • 2023ApJ...943L..15W

Authors • Wang, Qinan • Armstrong, Patrick • Zenati, Yossef • Ridden-Harper, Ryan • Rest, Armin • Arcavi, Iair • Kilpatrick, Charles D. • Foley, Ryan J. • Tucker, Brad E. • Lidman, Chris • Killestein, Thomas L. • Shahbandeh, Melissa • Anderson, Joseph P. • Angulo, Rodrigo • Ashall, Chris • Burke, Jamison • Chen, Ting-Wan • von Coelln, Sophie • Dalrymple, Kyle A. • Davis, Kyle W. • Fulton, Michael D. • Galbany, Lluís • Padilla Gonzalez, Estefania • Gao, Bore • Gromadzki, Mariusz • Howell, D. Andrew • Ihanec, Nada • Jencson, Jacob E. • Jones, David O. • Lyman, Joseph D. • McCully, Curtis • Müller-Bravo, Tomás E. • Newsome, Megan • Nicholl, Matt • O'Neill, David • Pellegrino, Craig • Rest, Sofia • Smartt, Stephen J. • Smith, Ken • Srivastav, Shubham • Terreran, Giacomo • Tinyanont, Samaporn • Young, David R. • Zenteno, Alfredo

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.

Links

• PREPRINT http://arxiv.org/abs/2211.03811
• NED https://ned.ipac.caltech.edu/uri/NED::InRefcode/2023ApJ...943L..15W
• ELECTR https://iopscience.iop.org/article/10.3847/2041-8213/acb0d0
• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2023ApJ...943L..15W
• PDF https://iopscience.iop.org/article/10.3847/2041-8213/acb0d0/pdf
• DATA http://archive.eso.org/bin/ads2eso?2023ApJ...943L..15W
• DATA https://archive.stsci.edu/mastbibref.php?bibcode=2023ApJ...943L..15W