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Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). European Southern Observatory, Germany; Technische Universität München, Germany.
Number of Authors: 32018 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 609, article id A72Article in journal (Refereed) Published
Abstract [en]

The most precise local measurements of H-0 rely on observations of Type Ia supernovae (SNe Ia) coupled with Cepheid distances to SN Ia host galaxies. Recent results have shown tension comparing H-0 to the value inferred from CMB observations assuming Lambda CDM, making it important to check for potential systematic uncertainties in either approach. To date, precise local H-0 measurements have used SN Ia distances based on optical photometry, with corrections for light curve shape and colour. Here, we analyse SNe Ia as standard candles in the near-infrared (NIR), where luminosity variations in the supernovae and extinction by dust are both reduced relative to the optical. From a combined fit to 9 nearby calibrator SNe with host Cepheid distances from Riess et al. (2016) and 27 SNe in the Hubble flow, we estimate the absolute peak J magnitude M-J = -18.524 +/- 0.041 mag and H-0 = 72.8 +/- 1.6 (statistical) +/- 2.7 (systematic) km s(-1) Mpc(-1). The 2.2% statistical uncertainty demonstrates that the NIR provides a compelling avenue to measuring SN Ia distances, and for our sample the intrinsic (unmodeled) peak J magnitude scatter is just similar to 0.10 mag, even without light curve shape or colour corrections. Our results do not vary significantly with different sample selection criteria, though photometric calibration in the NIR may be a dominant systematic uncertainty. Our findings suggest that tension in the competing H-0 distance ladders is likely not a result of supernova systematics that could be expected to vary between optical and NIR wavelengths, like dust extinction. We anticipate further improvements in H-0 with a larger calibrator sample of SNe Ia with Cepheid distances, more Hubble flow SNe Ia with NIR light curves, and better use of the full NIR photometric data set beyond simply the peak J-band magnitude.

Place, publisher, year, edition, pages
2018. Vol. 609, article id A72
Keywords [en]
supernovae: general
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-152541DOI: 10.1051/0004-6361/201731501ISI: 000419996100006OAI: oai:DiVA.org:su-152541DiVA, id: diva2:1183959
Available from: 2018-02-20 Created: 2018-02-20 Last updated: 2018-02-20Bibliographically approved

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