Authors
Qinan Wang, Anika Goel, Luc Dessart, Ori D Fox, Melissa Shahbandeh, Sofia Rest, Armin Rest, Jose H Groh, Andrew Allan, Claes Fransson, Nathan Smith, Griffin Hosseinzadeh, Alexei V Filippenko, Jennifer Andrews, K Azalee Bostroem, Thomas G Brink, Peter Brown, Jamison Burke, Roger Chevalier, Geoffrey C Clayton, Mi Dai, Kyle W Davis, Ryan J Foley, Sebastian Gomez, Chelsea Harris, Daichi Hiramatsu, D Andrew Howell, Connor Jennings, Saurabh W Jha, Mansi M Kasliwal, Patrick L Kelly, Erik C Kool, Evelyn Liu, Emily Ma, Curtis McCully, Adam M Miller, Yukei Murakami, Estefania Padilla Gonzalez, Craig Pellegrino, Derek Perera, Justin Pierel, César Rojas-Bravo, Matthew R Siebert, Jesper Sollerman, Tamás Szalai, Samaporn Tinyanont, Schuyler D Van Dyk, WeiKang Zheng, Kenneth C Chambers, David A Coulter, Thomas de Boer, Nicholas Earl, Diego Farias, Christa Gall, Peter McGill, Conor L Ransome, Kirsty Taggart, V Ashley Villar
Publication date
2024/6
Journal
Monthly Notices of the Royal Astronomical Society
Volume
530
Issue
4
Pages
3906-3923
Publisher
Oxford University Press
Description
A growing number of supernovae (SNe) are now known to exhibit evidence for significant interaction with a dense, pre-existing, circumstellar medium (CSM). SNe Ibn comprise one such class that can be characterized by both rapidly evolving light curves and persistent narrow He i lines. The origin of such a dense CSM in these systems remains a pressing question, specifically concerning the progenitor system and mass-loss mechanism. In this paper, we present multiwavelength data of the Type Ibn SN 2020nxt, including HST/STIS ultraviolet spectra. We fit the data with recently updated CMFGEN models designed to handle configurations for SNe Ibn. The UV coverage yields strong constraints on the energetics and, when combined with the CMFGEN models, offer new insight on potential progenitor systems. We find the most successful model is a ≲4 M⊙ helium star that lost its He-rich envelope in …
Total citations
20242
Scholar articles
Q Wang, A Goel, L Dessart, OD Fox, M Shahbandeh… - Monthly Notices of the Royal Astronomical Society, 2024