The M31 Near-Infrared Period-Luminosity Relation and its non-linearity for $\delta$ Cep Variables with $0.5\le \log (P)\le 1.7$

Abstract

We present the largest M31 near-infrared (F110W (close to J band), F160W (H band)) Cepheid sample so far. The sample consists of 371 Cepheids with photometry obtained from the HST PHAT program. The sample of 319 fundamental mode Cepheids, 16 first overtone Cepheids and 36 type II Cepheids, was identified using the median absolute deviation (MAD) outlier rejection method we develop here. This method does not rely on priors and allows us to obtain this clean Cepheid sample without rejecting a large fraction of Cepheids. The obtained Period-Luminosity relations (PLRs) have a very small dispersion, i.e. 0.155 mag in F160W, despite using random phased observations. This remarkably small dispersion allows us to determine that the PLRs are significantly better described by a broken slope at ten days than a linear slope. The use of our sample as an anchor to determine the Hubble constant gives a $3.2\%$ larger Hubble constant compared to the Riess et al. (2012) sample.

Accepted for publication in ApJ. Note that the estimate of the Hubble constant changed from the first to the second version. The estimation is now using the difference in the anchor galaxy and therefore the magnitude difference gives an increased Hubble constant

References in corpus (7)

• The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids
• On the distance of the Magellanic Clouds using Cepheid NIR and optical-NIR Period Wesenheit Relations
• New period-luminosity and period-color relations of classical Cepheids: III. Cepheids in SMC
• The VMC Survey. XIII. Type II Cepheids in the Large Magellanic Cloud
• Testing the nonlinearity of the BVIcJHKs period-luminosity relations for the Large Magellanic Cloud Cepheids
• A comprehensive study of Cepheid variables in the Andromeda galaxy. Period distribution, blending and distance determination
• Properties of M31. II: A Cepheid disk sample derived from the first year of PS1 PAndromeda data

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