{"paper":{"title":"A JWST Medium Resolution MIRI Spectrum and Models of the Type Ia supernova 2021aefx at +415 d","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Burrow, A. Cikota, A. Do, B. J. Shappee, B. Khaghani, C. Ashall, C. M. Telesco, C. Pfeffer, C. P. Stevens, C. R. Burns, D. Baade, E. Baron, E. Fereidouni, E. Y. Hsiao, F. Patat, I. Dominguez, J. Andrews, J. Lu, J. M. DerKacy, J. R. Maund, J. Schmidt, K. A. Bostroem, K. Krisciunas, K. Medler, L. Galbany, L. Wang, M. A. Tucker, M. D. Stritzinger, M. M. Phillips, M. Shahbandeh, N. B. Suntzeff, N. Morrell, O. Fox, P.Hoeflich, P. J. Brown, P. Mazzali, S. Kumar, S. Stangl, T. de Jaeger, T. Mera, Y. Dong, Y. Yang","submitted_at":"2024-04-25T21:08:28Z","abstract_excerpt":"We present a JWST MIRI/MRS spectrum (5-27 $\\mathrm{\\mu}$m) of the Type Ia supernova (SN Ia), SN 2021aefx at $+415$ days past $B$-band maximum. The spectrum, which was obtained during the iron-dominated nebular phase, has been analyzed in combination with previous JWST observations of SN 2021aefx, to provide the first JWST time series analysis of an SN Ia. We find the temporal evolution of the [Co III] 11.888 $\\mathrm{\\mu}$m feature directly traces the decay of $^{56}$Co. The spectra, line profiles, and their evolution are analyzed with off-center delayed-detonation models. Best fits were obtai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.17043","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2404.17043/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}