Artículo
SN 2011fu: A type IIb Supernova with a luminous double-peaked light curve
Morales Garoffolo, A.; Elias Rosa, N.; Bersten, Melina Cecilia
; Jerkstrand, A.; Taubenberger, S.; Benetti, S.; Cappellaro, E.; Kotak, R.; Pastorello, A.; Bufano, F.; Domínguez, R. M. ; Ergon, M.; Fraser, M.; Gao, X.; García, E.; Howell, D. A. ; Isern, J.; Smartt, S. J. ; Tomasella, L.; Valenti, S.
Fecha de publicación:
11/2015
Editorial:
Oxford University Press
Revista:
Monthly Notices Of The Royal Astronomical Society
ISSN:
0035-8711
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present optical and near infrared observations of the type IIb supernova (SN) 2011fu from a few days to ∼300 d after explosion. The SN presents a double-peaked light curve (LC) similar to that of SN 1993J, although more luminous and with a longer cooling phase after the primary peak. The spectral evolution is also similar to SN 1993J's, with hydrogen dominating the spectra to ∼40 d, then helium gaining strength, and nebular emission lines appearing from ∼60 d post-explosion. The velocities derived from the P-Cygni absorptions are overall similar to those of other type IIb SNe. We have found a strong similarity between the oxygen and magnesium line profiles at late times, which suggests that these lines are forming at the same location within the ejecta. The hydrodynamical modelling of the pseudo-bolometric LC and the observed photospheric velocities suggest that SN 2011fu was the explosion of an extended star (R∼450 Rsun), in which 1.3 ×1051 erg of kinetic energy were released and 0.15 Msun of 56Ni were synthesised. In addition, a better reproduction of the observed early pseudo-bolometric LC is achieved if a more massive H-rich-envelope than for other type IIb SNe is considered (0.3 Msun). The hydrodynamical modelling of the LC and the comparison of our late-time spectra with nebular spectral models for type IIb SNe, point to a progenitor for SN 2011fu with a ZAMS mass of 13-18 Msun.
Palabras clave:
Supernovae
,
Sn 2011fu (Supernova)
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Identificadores
Colecciones
Articulos(IALP)
Articulos de INST.DE ASTROFISICA LA PLATA
Articulos de INST.DE ASTROFISICA LA PLATA
Citación
Morales Garoffolo, A.; Elias Rosa, N.; Bersten, Melina Cecilia; Jerkstrand, A.; Taubenberger, S.; et al.; SN 2011fu: A type IIb Supernova with a luminous double-peaked light curve; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 454; 11-2015
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