Optical and near infrared observations of SN 1998bu

Infrared and optical spectra of SN 1998bu at an age of one year after explosion are presented. The data show evidence for the radioactive decay of 56Co to 56Fe, long assumed to be the powering source for the supernova light curve past maximum light. The spectra provide direct evidence for at least 0...

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Published inAstronomy and astrophysics (Berlin) Vol. 426; no. 2; pp. 547 - 553
Main Authors Spyromilio, J., Gilmozzi, R., Sollerman, J., Leibundgut, B., Fransson, C., Cuby, J.-G.
Format Journal Article
LanguageEnglish
Published Les Ulis EDP Sciences 01.11.2004
Subjects
Astrophysics
Cosmology and Extra-Galactic Astrophysics
Physics
stars: supernovae: general
stars: supernovae: individual: SN 1998bu
Supernovae
Light curves
Infrared observation
stars: supernovae: general- stars: supernovae: individual: SN 1998bu
Emission line
Infrared spectra
Age
Optical spectrum
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Summary:Infrared and optical spectra of SN 1998bu at an age of one year after explosion are presented. The data show evidence for the radioactive decay of 56Co to 56Fe, long assumed to be the powering source for the supernova light curve past maximum light. The spectra provide direct evidence for at least 0.4 solar masses of iron being present in the ejecta of the supernova. The fits to the data also show that the widths of the emission lines increase with time. Photometric measurements in the H-band show that the supernova is not fading during the observation period. This is consistent with theoretical expectations.
Bibliography:publisher-ID:aa0570-04
Based on observations collected at the La Silla and Paranal observatories of the European Southern observatory, Chile in time allocated to proposals 63.H-0527, 63.H-0649.
other:2004A%26A...426..547S
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ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0004-6361
1432-0746
1432-0756
DOI:10.1051/0004-6361:20040570