The peculiar type II supernova 1997D

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dc.contributor.authorTuratto, M
dc.contributor.authorMazzali, PA
dc.contributor.authorYoung, TR
dc.contributor.authorNomoto, K
dc.contributor.authorIwamoto, K
dc.contributor.authorBenetti, S
dc.contributor.authorCappellaro, E
dc.contributor.authorDanziger, IJ
dc.contributor.authorde Mello, DF
dc.contributor.authorPhillips, MM
dc.contributor.authorSuntzeff, NB
dc.contributor.authorClocchiatti, A
dc.contributor.authorPiemonte, A
dc.contributor.authorLeibundgut, B
dc.contributor.authorCovarrubias, R
dc.contributor.authorMaza, J
dc.contributor.authorSollerman, J
dc.date.accessioned2025-01-21T01:32:42Z
dc.date.available2025-01-21T01:32:42Z
dc.date.issued1998
dc.description.abstractSN 1997D in NGC 1536 is possibly the least luminous and energetic Type II supernova discovered to date. The entire light curve is subluminous, never reaching M-v = -14.65. The radioactive tail follows the Co-56 decay slope. In the case of a nearly complete trapping of the gamma-rays, the Ni-56 mass derived from the tail brightness is extremely small, similar to 0.002 M.. At discovery, the spectra showed a red continuum and line velocities on the order of 1000 km s(-1). The luminosity and the photospheric expansion velocity suggest that the explosion occurred about 50 days before discovery and that a plateau probably followed. Model light curves and spectra of the explosion of a 26 M. star successfully fitted the observations. Low-mass models are inconsistent with the observations. The radius of the progenitor, constrained by the prediscovery upper limits, is R-0 less than or similar to 300 R.. A low explosion energy of similar to 4 x 10(50) ergs is then required in the modeling. The strong Pa II lines in the photospheric spectra are reproduced with a solar abundance and low T-eff. A scenario in which the low Ni-56 mass observed in SN 1997D is due to fallback of material onto the collapsed remnant of the explosion of a 25-40 M. star appears to be favored over the case of the explosion of an 8-10 M. star with low Ni-56 production.
dc.fuente.origenWOS
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97307
dc.identifier.wosidWOS:000073671600009
dc.issue.numero2
dc.language.isoen
dc.pagina.finalL133
dc.pagina.inicioL129
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectnuclear reactions, nucleosynthesis, abundances
dc.subjectstars, evolution
dc.subjectsupernovae, general
dc.subjectsupernovae, individual (SN 1997D)
dc.titleThe peculiar type II supernova 1997D
dc.typeartículo
dc.volumen498
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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