SN 2005kd: another very luminous, slowly declining type IIn supernova
D. Yu. Tsvetkov
TL;DR
SN 2005kd is a very luminous type IIn supernova with a prolonged brightness and a unique plateau phase, providing new insights into the diversity of supernova light curves.
Contribution
This study presents detailed photometry of SN 2005kd, highlighting its exceptional luminosity and the first observation of a plateau phase in a type IIn supernova.
Findings
Maximum luminosity exceeded Mv=-19.8
Remained brighter than -18 mag for about 400 days
Displayed a unique plateau between 119 and 311 days
Abstract
CCD UBVRI photometry is presented for type IIn SN 2005kd. The maximum luminosity exceeded Mv=-19.8, and SN remained brighter than -18 mag for about 400 days. While overall photometric evolution is quite similar to SN 1997cy, SN 2005kd shows a plateau at phases between 119 and 311 days past explosion, which is a unique feature for SN IIn.
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Taxonomy
TopicsGamma-ray bursts and supernovae