Optical and near infrared observations of SN 1998bu

Details Optical and near infrared observations of SN 1998bu Optical and near infrared observations of SN 1998bu

2004-07-08

arxiv.org/abs/astro-ph/0407177v1

Astron.Astrophys. 426 (2004) 547-553

Astronomy and Astrophysics

Astrophysics

accepted A&A, 7 pages, 9 figures

Scientific paper

10.1051/0004-6361:20040570

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.

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