A long life of excess: The interacting transient SN 2017hcc
No hay miniatura disponible
Archivos
Fecha
2023-01
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
EDP Sciences
Nombre de Curso
Licencia CC
CC BY 4.0 DEED Attribution 4.0 International
Licencia CC
Resumen
In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at -20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 d. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs ≳;+800 d. © The Authors 2023.
Notas
Indexación: Scopus.
Palabras clave
Supernovae: general, Supernovae: individual: ATLAS17lsn, Supernovae: individual: PS17fra, Supernovae: individual: SN 2017hcc
Citación
Astronomy and Astrophysics. Volume 669. 1 January 2023. Article number A51
DOI
10.1051/0004-6361/202244565