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Serendipitous nebular-phase JWST imaging of SN Ia SN 2021aefx: testing the confinement of 56Co decay energy

We present new 0.3-21 μm photometry of SN 2021aefx in the spiral galaxy NGC 1566 at +357 days after B-band maximum, including the first detection of any Type Ia supernova (SN Ia) at >15 μm. These observations follow earlier JWST observations of SN 2021aefx at +255 days after the time of maximum b...

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Main Authors: Mayker Chen, Ness (Author) , Tucker, Michael A. (Author) , Hoyer, Nils (Author) , Jha, Saurabh W. (Author) , Kwok, Lindsey A. (Author) , Leroy, Adam K. (Author) , Rosolowsky, Erik (Author) , Ashall, Chris (Author) , Anand, Gagandeep (Author) , Bigiel, Frank (Author) , Boquien, Médéric (Author) , Burns, Chris (Author) , Dale, Daniel (Author) , DerKacy, James M. (Author) , Egorov, Oleg (Author) , Galbany, L. (Author) , Grasha, Kathryn (Author) , Hassani, Hamid (Author) , Hoeflich, Peter (Author) , Hsiao, Eric (Author) , Klessen, Ralf S. (Author) , Lopez, Laura A. (Author) , Lu, Jing (Author) , Morrell, Nidia (Author) , Orellana, Mariana (Author) , Pinna, Francesca (Author) , Sarbadhicary, Sumit K. (Author) , Schinnerer, Eva (Author) , Shahbandeh, Melissa (Author) , Stritzinger, Maximilian (Author) , Thilker, David A. (Author) , Williams, Thomas G. (Author)
Format: Article (Journal) Editorial
Language:English
Published: 2023 February 15
In: The astrophysical journal. Part 2, Letters
Year: 2023, Volume: 944, Issue: 2, Pages: 1-9
ISSN:2041-8213
DOI:10.3847/2041-8213/acb6d8
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/2041-8213/acb6d8
Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.3847/2041-8213/acb6d8
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Author Notes:Ness Mayker Chen, Michael A. Tucker, Nils Hoyer, Saurabh W. Jha, Lindsey A. Kwok, Adam K. Leroy, Erik Rosolowsky, Chris Ashall, Gagandeep Anand, Frank Bigiel, Médéric Boquien, Chris Burns, Daniel Dale, James M. DerKacy, Oleg V. Egorov, L. Galbany, Kathryn Grasha, Hamid Hassani, Peter Hoeflich, Eric Hsiao, Ralf S. Klessen, Laura A. Lopez, Jing Lu, Nidia Morrell, Mariana Orellana, Francesca Pinna, Sumit K. Sarbadhicary, Eva Schinnerer, Melissa Shahbandeh, Maximilian Stritzinger, David A. Thilker, and Thomas G. Williams
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Summary:We present new 0.3-21 μm photometry of SN 2021aefx in the spiral galaxy NGC 1566 at +357 days after B-band maximum, including the first detection of any Type Ia supernova (SN Ia) at >15 μm. These observations follow earlier JWST observations of SN 2021aefx at +255 days after the time of maximum brightness, allowing us to probe the temporal evolution of the emission properties. We measure the fraction of flux emerging at different wavelengths and its temporal evolution. Additionally, the integrated 0.3-14 μm decay rate of Δm 0.3-14 = 1.35 ± 0.05 mag/100 days is higher than the decline rate from the radioactive decay of 56Co of ∼1.2 mag/100 days. The most plausible explanation for this discrepancy is that flux is shifting to >14 μm, and future JWST observations of SNe Ia will be able to directly test this hypothesis. However, models predicting nonradiative energy loss cannot be excluded with the present data.
Item Description:Gesehen am 06.04.2023
Physical Description:Online Resource
ISSN:2041-8213
DOI:10.3847/2041-8213/acb6d8

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