Artículo
SN 2021gno: a calcium-rich transient with double-peaked light curves
Ertini, Keila Yael
; Folatelli, Gaston
; Martinez, Laureano
; Bersten, Melina Cecilia
; Anderson, J. P.; Ashall, Chris; Baron, Edward; Bose, S.; Brown, P. J.; Burns, C.; DerKacy, J. M.; Ferrari, Lucía
; Galbany, Lluís; Hsiao, Eric; Kumar, S.; Lu, J.; Mazzali, P.; Morrell, Nidia Irene
; Orellana, Mariana Dominga
; Pessi, Priscila Jael
; Phillips, M. M.; Piro, A. L.; Polin, A.; Shahbandeh, M.; Shappee, B. J.; Harvey, L.; Nicholl, M.; Paraskeva, E.; Young, D. R.; Englert, B.
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
09/2023
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present extensive ultraviolet (UV) and optical photometric and optical spectroscopic follow-up of supernova (SN) 2021gno by the ‘Precision Observations of Infant Supernova Explosions’ (POISE) project, starting less than 2 d after the explosion. Given its intermediate luminosity, fast photometric evolution, and quick transition to the nebular phase with spectra dominated by [Ca II] lines, SN 2021gno belongs to the small family of Calcium-rich transients. Moreover, it shows double-peaked light curves, a phenomenon shared with only four other Calcium-rich events. The projected distance from the centre of the host galaxy is not as large as other objects in this family. The initial optical light-curve peaks coincide with a very quick decline of the UV flux, indicating a fast initial cooling phase. Through hydrodynamical modelling of the bolometric light curve and line velocity evolution, we found that the observations are compatible with the explosion of a highly stripped massive star with an ejecta mass of and a 56Ni mass of 0.024 M⊙. The initial cooling phase (first light-curve peak) is explained by the presence of an extended circumstellar material comprising ∼ with an extension of . We discuss if hydrogen features are present in both maximum-light and nebular spectra, and their implications in terms of the proposed progenitor scenarios for Calcium-rich transients.
Palabras clave:
supernovae: general
,
supernovae: individual: SN 2021gno
,
star: massive
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Ertini, Keila Yael; Folatelli, Gaston; Martinez, Laureano; Bersten, Melina Cecilia; Anderson, J. P.; et al.; SN 2021gno: a calcium-rich transient with double-peaked light curves; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 526; 1; 9-2023; 279-298
Compartir
Altmétricas