Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of 56Co Decay Energy

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; Peter Hoeflich; Eric Hsiao; Ralf S. Klessen; Hamid Hassani; Laura A. Lopez; Jing Lu; Nidia Morrell; Mariana Orellana; Francesca Pinna; Sumit K. Sarbadhicary; Eva Schinnerer; Melissa Shahbandeh; Maximilian Stritzinger; David A. Thilker; Thomas G. Williams

doi:10.3847/2041-8213/acb6d8

Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of ⁵⁶Co Decay Energy

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, Peter Hoeflich, Eric Hsiao, Ralf S. KlessenHamid Hassani, Laura A. Lopez, Jing Lu, Nidia Morrell, Mariana Orellana, Francesca Pinna, Sumit K. Sarbadhicary, Eva Schinnerer, Melissa Shahbandeh, Maximilian Stritzinger, David A. Thilker, Thomas G. Williams

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Abstract

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.

Original language	English
Article number	L28
Journal	Astrophysical Journal Letters
Volume	944
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/acb6d8
Publication status	Published - 1 Feb 2023

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Chen, N. M., Tucker, M. A., Hoyer, N., Jha, S. W., Kwok, L. A., Leroy, A. K., Rosolowsky, E., Ashall, C., Anand, G., Bigiel, F., Boquien, M., Burns, C., Dale, D., DerKacy, J. M., Egorov, O. V., Galbany, L., Grasha, K., Hoeflich, P., Hsiao, E., ... Williams, T. G. (2023). Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of ⁵⁶Co Decay Energy. Astrophysical Journal Letters, 944(2), Article L28. https://doi.org/10.3847/2041-8213/acb6d8

@article{e17801433e6a497bae42dbfa5d27c81f,

title = "Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of 56Co Decay Energy",

abstract = "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 Δm0.3-14 = 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.",

author = "Chen, {Ness Mayker} and Tucker, {Michael A.} and Nils Hoyer and Jha, {Saurabh W.} and Kwok, {Lindsey A.} and Leroy, {Adam K.} and Erik Rosolowsky and Chris Ashall and Gagandeep Anand and Frank Bigiel and M{\'e}d{\'e}ric Boquien and Chris Burns and Daniel Dale and DerKacy, {James M.} and Egorov, {Oleg V.} and L. Galbany and Kathryn Grasha and Peter Hoeflich and Eric Hsiao and Klessen, {Ralf S.} and Hamid Hassani and Lopez, {Laura A.} and Jing Lu and Nidia Morrell and Mariana Orellana and Francesca Pinna and Sarbadhicary, {Sumit K.} and Eva Schinnerer and Melissa Shahbandeh and Maximilian Stritzinger and Thilker, {David A.} and Williams, {Thomas G.}",

year = "2023",

month = feb,

day = "1",

doi = "10.3847/2041-8213/acb6d8",

language = "English",

volume = "944",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2",

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Chen, NM, Tucker, MA, Hoyer, N, Jha, SW, Kwok, LA, Leroy, AK, Rosolowsky, E, Ashall, C, Anand, G, Bigiel, F, Boquien, M, Burns, C, Dale, D, DerKacy, JM, Egorov, OV, Galbany, L, Grasha, K, Hoeflich, P, Hsiao, E, Klessen, RS, Hassani, H, Lopez, LA, Lu, J, Morrell, N, Orellana, M, Pinna, F, Sarbadhicary, SK, Schinnerer, E, Shahbandeh, M, Stritzinger, M, Thilker, DA & Williams, TG 2023, 'Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of ⁵⁶Co Decay Energy', Astrophysical Journal Letters, vol. 944, no. 2, L28. https://doi.org/10.3847/2041-8213/acb6d8

TY - JOUR

T1 - Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx

T2 - Testing the Confinement of 56Co Decay Energy

AU - Chen, Ness Mayker

AU - Tucker, Michael A.

AU - Hoyer, Nils

AU - Jha, Saurabh W.

AU - Kwok, Lindsey A.

AU - Leroy, Adam K.

AU - Rosolowsky, Erik

AU - Ashall, Chris

AU - Anand, Gagandeep

AU - Bigiel, Frank

AU - Boquien, Médéric

AU - Burns, Chris

AU - Dale, Daniel

AU - DerKacy, James M.

AU - Egorov, Oleg V.

AU - Galbany, L.

AU - Grasha, Kathryn

AU - Hoeflich, Peter

AU - Hsiao, Eric

AU - Klessen, Ralf S.

AU - Hassani, Hamid

AU - Lopez, Laura A.

AU - Lu, Jing

AU - Morrell, Nidia

AU - Orellana, Mariana

AU - Pinna, Francesca

AU - Sarbadhicary, Sumit K.

AU - Schinnerer, Eva

AU - Shahbandeh, Melissa

AU - Stritzinger, Maximilian

AU - Thilker, David A.

AU - Williams, Thomas G.

PY - 2023/2/1

Y1 - 2023/2/1

N2 - 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 Δm0.3-14 = 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.

AB - 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 Δm0.3-14 = 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.

UR - http://www.scopus.com/inward/record.url?scp=85149220887&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/acb6d8

DO - 10.3847/2041-8213/acb6d8

M3 - Article

SN - 2041-8205

VL - 944

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L28

ER -

Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of ⁵⁶Co Decay Energy

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