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Sn 1998A: explosion of a blue supergiant

Pastorello, A; Baron, E; Branch, David; Zampieri, L; Turatto, Massimo; Ramina, M; Benetti, Stefano; Cappellaro, Enrico; Salvo, Maria; Patat, Ferdinando; Piemonte, A; Sollerman, Jesper; Leibundgut, Bruno; Altavilla, G

Description

We present spectroscopic and photometric observations of the peculiar Type II supernova (SN) 1998A. The light curves and spectra closely resemble those of SN 1987A, suggesting that the SN 1998A progenitor exploded when it was a compact blue supergiant. However, the comparison with SN 1987A also highlights some important differences: SN 1998A is more luminous and the spectra show bluer continua and larger expansion velocities at all epochs. These observational properties indicate that the...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
URI: http://hdl.handle.net/1885/81408
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1111/j.1365-2966.2005.09079.x

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