학술논문
Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve
Document Type
article
Author
Qinan Wang; Patrick Armstrong; Yossef Zenati; Ryan Ridden-Harper; Armin Rest; Iair Arcavi; Charles D. Kilpatrick; Ryan J. Foley; Brad E. Tucker; Chris Lidman; Thomas L. Killestein; Melissa Shahbandeh; Joseph P Anderson; Rodrigo Angulo; Chris Ashall; Jamison Burke; Ting-Wan Chen; Sophie von Coelln; Kyle A. Dalrymple; Kyle W. Davis; Michael D. Fulton; Lluís Galbany; Estefania Padilla Gonzalez; Bore Gao; Mariusz Gromadzki; D. Andrew Howell; Nada Ihanec; Jacob E. Jencson; David O. Jones; Joseph D. Lyman; Curtis McCully; Tomás E. Müller-Bravo; Megan Newsome; Matt Nicholl; David O’Neill; Craig Pellegrino; Sofia Rest; Stephen J. Smartt; Ken Smith; Shubham Srivastav; Giacomo Terreran; Samaporn Tinyanont; David R. Young; Alfredo Zenteno
Source
The Astrophysical Journal Letters, Vol 943, Iss 2, p L15 (2023)
Subject
Language
English
ISSN
2041-8213
2041-8205
2041-8205
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.