TY - JOUR PB - OXFORD UNIV PRESS ID - discovery10191069 SP - 155 JF - Monthly Notices of the Royal Astronomical Society A1 - Zsiros, Szanna A1 - Szalai, Tamas A1 - De Looze, Ilse A1 - Sarangi, Arkaprabha A1 - Shahbandeh, Melissa A1 - Fox, Ori D A1 - Temim, Tea A1 - Milisavljevic, Dan A1 - Van Dyk, Schuyler D A1 - Smith, Nathan A1 - Filippenko, Alexei A1 - Brink, Thomas G A1 - Zheng, Weikang A1 - Dessart, Luc A1 - Jencson, Jacob A1 - Johansson, Joel A1 - Pierel, Justin A1 - Rest, Armin A1 - Tinyanont, Samaporn A1 - Niculescu-Duvaz, Maria A1 - Barlow, MJ A1 - Wesson, Roger A1 - Andrews, Jennifer A1 - Clayton, Geoff A1 - De, Kishalay A1 - Dwek, Eli A1 - Engesser, Michael A1 - Foley, Ryan J A1 - Gezari, Suvi A1 - Gomez, Sebastian A1 - Gonzaga, Shireen A1 - Kasliwal, Mansi A1 - Lau, Ryan A1 - Marston, Anthony A1 - O'Steen, Richard A1 - Siebert, Matthew A1 - Skrutskie, Michael A1 - Strolger, Lou A1 - Wang, Qinan A1 - Williams, Brian A1 - Williams, Robert A1 - Xiao, Lin UR - http://dx.doi.org/10.1093/mnras/stae507 KW - Supernovae: general KW - supernovae: individual: SN 1980K KW - dust KW - extinction KW - infrared: stars AV - public IS - 1 TI - Serendipitous detection of the dusty Type IIL SN 1980K with JWST/MIRI Y1 - 2024/03// N1 - 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. SN - 0035-8711 N2 - 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). VL - 529 EP - 168 ER -