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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| Veröffentlicht in: | Astrophysical journal. Letters 2023-02, Vol.944 (2), p.L28 |
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| creator | Chen, Ness Mayker Tucker, Michael A. Hoyer, Nils Jha, Saurabh W. Kwok, Lindsey A. Leroy, Adam K. Rosolowsky, Erik Ashall, Chris Anand, Gagandeep Bigiel, Frank Boquien, Médéric Burns, Chris Dale, Daniel DerKacy, James M. Egorov, Oleg V. Galbany, L. Grasha, Kathryn Hassani, Hamid Hoeflich, Peter Hsiao, Eric Klessen, Ralf S. Lopez, Laura A. Lu, Jing Morrell, Nidia Orellana, Mariana Pinna, Francesca Sarbadhicary, Sumit K. Schinnerer, Eva Shahbandeh, Melissa Stritzinger, Maximilian Thilker, David A. Williams, Thomas G. |
| description | 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. |
| doi_str_mv | 10.3847/2041-8213/acb6d8 |
| format | Article |
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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. 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Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>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. 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Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2023-02-01</date><risdate>2023</risdate><volume>944</volume><issue>2</issue><spage>L28</spage><pages>L28-</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><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. 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| fulltext | fulltext |
| identifier | ISSN: 2041-8205 |
| ispartof | Astrophysical journal. Letters, 2023-02, Vol.944 (2), p.L28 |
| issn | 2041-8205 2041-8213 |
| language | eng |
| recordid | cdi_iop_journals_10_3847_2041_8213_acb6d8 |
| source | IOP Publishing Free Content; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; IOPscience extra; Alma/SFX Local Collection |
| subjects | Decay rate Emission measurements Energy loss Evolution Galaxies Infrared astronomy Radioactive decay Spiral galaxies Supernova Supernovae Type Ia supernovae Wavelengths |
| title | Serendipitous Nebular-phase JWST Imaging of SN Ia SN 2021aefx: Testing the Confinement of 56Co Decay Energy |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-15T23%3A24%3A21IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_iop_j&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Serendipitous%20Nebular-phase%20JWST%20Imaging%20of%20SN%20Ia%20SN%202021aefx:%20Testing%20the%20Confinement%20of%2056Co%20Decay%20Energy&rft.jtitle=Astrophysical%20journal.%20Letters&rft.au=Chen,%20Ness%20Mayker&rft.date=2023-02-01&rft.volume=944&rft.issue=2&rft.spage=L28&rft.pages=L28-&rft.issn=2041-8205&rft.eissn=2041-8213&rft_id=info:doi/10.3847/2041-8213/acb6d8&rft_dat=%3Cproquest_iop_j%3E2777068423%3C/proquest_iop_j%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2777068423&rft_id=info:pmid/&rft_doaj_id=oai_doaj_org_article_60fbeb07758c42fdbe1b1531eb0e918b&rfr_iscdi=true |