Type II-P supernovae as standardised candles: improvements using near infrared data
Abstract
We present the first near infrared Hubble diagram for type II-P supernovae to further explore their value as distance indicators. We use a modified version of the standardised candle method which relies on the tight correlation between the absolute magnitudes of type II-P supernovae and their expansion velocities during the plateau phase. Although our sample contains only 12 II-P supernovae and they are necessarily local (z < 0.02), we demonstrate using near infrared JHK photometry that it may be possible to reduce the scatter in the Hubble diagram to 0.1-0.15 magnitudes. While this is potentially similar to the dispersion seen for type Ia supernovae, we caution that this needs to be confirmed with a larger sample of II-P supernovae in the Hubble flow.
Keywords
Cite
@article{arxiv.0912.3107,
title = {Type II-P supernovae as standardised candles: improvements using near infrared data},
author = {Kate Maguire and Rubina Kotak and Stephen J. Smartt and Andrea Pastorello and Mario Hamuy and Filomena Bufano},
journal= {arXiv preprint arXiv:0912.3107},
year = {2016}
}
Comments
6 pages, 1 figure, 1 table, accepted for publication in MNRAS Letters