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Browsing by Author "Armstrong, Patrick"

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    Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve
    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, Lluis; Gonzalez, Estefania Padilla; Gao, Bore; Gromadzki, Mariusz; Howell, D. Andrew; Ihanec, Nada; Jencson, Jacob E.; Jones, David O.; Lyman, Joseph D.; McCully, Curtis; Muller-Bravo, Tomas 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 (IOP Publishing, 2023-02-01)
    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 similar to 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 similar to 0.30-0.65 M-circle dot and an envelope radius of similar to 120-300 R-circle dot. 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.