SN 1998S
SN 1998S was a type IIn supernova that was detected in NGC 3877 in March 1998. At the time of discovery, SN 1998S was the brightest type IIn event observed,[2] although later outshone by SN 2010jl.[3]
It was discovered on 1998 March 2.68 UT in NGC 3877 by Z. Wan at a broadband (unfiltered) optical magnitude of +15.2.
Its spectrum showed prominent H and He emission lines with narrow peaks and broad wings, superimposed on a blue continuum. These narrow lines indicate the presence of a dense circumstellar medium (CSM) in the vicinity of the supernova. The high luminosity of SN1998S is due to the interaction of fast material (ejecta) with previously-expelled slowly-expanding material (CSM), which can more effectively convert kinetic energy of ejecta into radiation energy.[4]
References
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External links
[edit | edit source]- Light curves and spectra Archived 2017-11-14 at the Wayback Machine on the Open Supernova Catalog Archived 2016-03-03 at the Wayback Machine
- Simbad
- https://www.astro.utoronto.ca/DDO/research/DDOSNe.html
