Journal Article

SN 2016jhj at redshift 0.34: extending the Type II supernova Hubble diagram using the standard candle method

T. de Jaeger, L. Galbany, A. V. Filippenko, S. González-Gaitán, N. Yasuda, K. Maeda, M. Tanaka, T. Morokuma, T. J. Moriya, N. Tominaga, K. Nomoto, Y. Komiyama, J. P. Anderson, T. G. Brink, R. G. Carlberg, G. Folatelli, M. Hamuy, G. Pignata and W. Zheng

in Monthly Notices of the Royal Astronomical Society

Published on behalf of Royal Astronomical Society

Volume 472, issue 4, pages 4233-4243
ISSN: 0035-8711
Published online September 2017 | e-ISSN: 1365-2966 | DOI:
SN 2016jhj at redshift 0.34: extending the Type II supernova Hubble diagram using the standard candle method

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Although Type Ia supernova cosmology has now reached a mature state, it is important to develop as many independent methods as possible to understand the true nature of dark energy. Recent studies have shown that Type II supernovae (SNe II) offer such a path and could be used as alternative distance indicators. However, the majority of these studies were unable to extend the Hubble diagram above redshift z = 0.3 because of observational limitations. Here, we show that we are now ready to move beyond low redshifts and attempt high-redshift (z ≳ 0.3) SN II cosmology as a result of new-generation deep surveys such as the Subaru/Hyper Suprime-Cam survey. Applying the ‘standard candle method’ to SN 2016jhj (z = 0.3398 ± 0.0002; discovered by HSC) together with a low-redshift sample, we are able to construct the highest-redshift SN II Hubble diagram to date with an observed dispersion of 0.27 mag (i.e. 12–13 per cent in distance). This work demonstrates the bright future of SN II cosmology in the coming era of large, wide-field surveys like that of the Large Synoptic Survey Telescope.

Keywords: supernovae: general; galaxies: distances and redshifts; distance scale

Journal Article.  8087 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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