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

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

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.403l..11m&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 403, Issue 1, pp. L11-L15.

Astronomy and Astrophysics

Astronomy

6

Supernovae: General, Galaxies: General, Distance Scale

Scientific paper

We present the first near-infrared Hubble diagram for Type II-P supernovae (SNe), to further explore their value as distance indicators. We use a modified version of the standardized candle method, which relies on the tight correlation between the absolute magnitudes of Type II-P SNe and their expansion velocities during the plateau phase. Although our sample contains only 12 II-P SNe 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 mag. While this is potentially similar to the dispersion seen for Type Ia SNe, we caution that this needs to be confirmed with a larger sample of II-P SNe in the Hubble flow.
Based on data obtained with telescopes from Las Campanas Observatory and the University of Arizona.
E-mail: kmaguire11@qub.ac.uk

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