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arXiv · 0912.3107

Type II-P supernovae as standardised candles: improvements using near infrared data

Kate Maguire·Rubina Kotak·Stephen J. Smartt·Andrea Pastorello·Mario Hamuy·Filomena Bufano
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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.

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Kate Maguire, Rubina Kotak, Stephen J. Smartt, Andrea Pastorello, Mario Hamuy, Filomena Bufano. 2009-12-16. Type II-P supernovae as standardised candles: improvements using near infrared data. https://doi.org/10.1111/j.1745-3933.2009.00804.x

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