The underluminous Type Ia supernova 2005bl and the class of objects similar to SN 1991bg
Author
dc.contributor.author
Taubenberger, S.
Author
dc.contributor.author
Hachinger, S.
es_CL
Author
dc.contributor.author
Pignata Libralato, Giuliano
es_CL
Author
dc.contributor.author
Mazzali, Paolo
es_CL
Author
dc.contributor.author
Contreras, C.
es_CL
Author
dc.contributor.author
Valenti, S.
es_CL
Author
dc.contributor.author
Pastorello, A.
es_CL
Author
dc.contributor.author
Elias Rosa, L.
es_CL
Author
dc.contributor.author
Bärnbantner, O.
es_CL
Author
dc.contributor.author
Barwig, H.
es_CL
Author
dc.contributor.author
Benetti, S.
es_CL
Author
dc.contributor.author
Dolci, M.
es_CL
Author
dc.contributor.author
Fliri, J.
es_CL
Author
dc.contributor.author
Folatelli, Gastón
es_CL
Author
dc.contributor.author
Freedman, W. L.
es_CL
Author
dc.contributor.author
González, S.
es_CL
Author
dc.contributor.author
Hamuy Wackenhut, Mario
es_CL
Author
dc.contributor.author
Krzeminski, W.
es_CL
Author
dc.contributor.author
Morrell, N.
es_CL
Author
dc.contributor.author
Navasardyan, H.
es_CL
Author
dc.contributor.author
Persson, S. E.
es_CL
Author
dc.contributor.author
Phillips, M. M.
es_CL
Author
dc.contributor.author
Ries, C.
es_CL
Author
dc.contributor.author
Roth, M.
es_CL
Author
dc.contributor.author
Suntzeff, Nicholas B.
es_CL
Author
dc.contributor.author
Turatto, M.
es_CL
Author
dc.contributor.author
Hillebrandt, W.
es_CL
Admission date
dc.date.accessioned
2014-01-08T19:21:58Z
Available date
dc.date.available
2014-01-08T19:21:58Z
Publication date
dc.date.issued
2008
Cita de ítem
dc.identifier.citation
Mon. Not. R. Astron. Soc. 385, 75–96 (2008)
en_US
Identifier
dc.identifier.other
doi:10.1111/j.1365-2966.2008.12843.x
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/126074
General note
dc.description
Artículo de publicación ISI
en_US
Abstract
dc.description.abstract
Optical observations of the Type Ia supernova (SN Ia) 2005bl in NGC 4070, obtained from
−6 to +66 d with respect to the B-band maximum, are presented. The photometric evolution
is characterized by rapidly declining light curves [ m15(B)true = 1.93] and red colours
at peak and soon thereafter. With MB,max = −17.24 the SN is an underluminous SN Ia,
similar to the peculiar SNe 1991bg and 1999by. This similarity also holds for the spectroscopic
appearance, the only remarkable difference being the likely presence of carbon in
pre-maximum spectra of SN 2005bl. A comparison study among underluminous SNe Ia is
performed, based on a number of spectrophotometric parameters. Previously reported correlations
of the light-curve decline rate with peak luminosity and R(Si) are confirmed, and
a large range of post-maximum Si II λ6355 velocity gradients is encountered. 1D synthetic
spectra for SN 2005bl are presented, which confirm the presence of carbon and suggest an
overall low burning efficiency with a significant amount of leftover unburned material. Also,
the Fe content in pre-maximum spectra is very low, which may point to a low metallicity of the
precursor. Implications for possible progenitor scenarios of underluminous SNe Ia are briefly
discussed.