Zsiros, Szanna;
Szalai, Tamas;
De Looze, Ilse;
Sarangi, Arkaprabha;
Shahbandeh, Melissa;
Fox, Ori D;
Temim, Tea;
... Xiao, Lin; + view all
(2024)
Serendipitous detection of the dusty Type IIL SN 1980K with JWST/MIRI.
Monthly Notices of the Royal Astronomical Society
, 529
(1)
pp. 155-168.
10.1093/mnras/stae507.
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Abstract
We present mid-infrared (mid-IR) imaging of the Type IIL supernova (SN) 1980K with the JWST more than 40 yr post-explosion. SN 1980K, located in the nearby ( D ≈7 Mpc) 'SN factory' galaxy NGC 6946, was serendipitously captured in JWST /MIRI images taken of the field of SN 2004et in the same galaxy. SN 1980K serves as a promising candidate for studying the transitional phase between young SNe and older SN remnants and also provides a great opportunity to investigate its the close environment. SN 1980K can be identified as a clear and bright point source in all eight MIRI filters from F 560 W up to F 2550 W . We fit analytical dust models to the mid-IR spectral energy distribution that reveal a large amount ( M d ≈0.002 M ⊙) of Si-dominated dust at T dust ≈150 K (accompanied by a hotter dust/gas component), and also computed numerical SED dust models. Radiative transfer modelling of a late-time optical spectrum obtained recently with Keck discloses that an even larger ( ∼0.24-0.58 M ⊙) amount of dust is needed in order for selectiv e e xtinction to explain the asymmetric line profile shapes observed in SN 1980K. As a conclusion, with JWST , we may see i) pre-existing circumstellar dust heated collisionally (or, partly radiatively), analogous to the equatorial ring of SN 1987A, or ii) the mid-IR component of the presumed newly-formed dust, accompanied by much more colder dust present in the ejecta (as suggested by the late-time the optical spectra).
| Type: | Article |
|---|---|
| Title: | Serendipitous detection of the dusty Type IIL SN 1980K with JWST/MIRI |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stae507 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stae507 |
| Language: | English |
| Additional information: | Copyright © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Supernovae: general, supernovae: individual: SN 1980K, dust, extinction, infrared: stars |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191069 |
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