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arXiv · 1807.03544

Near-infrared Mira Period-Luminosity Relations in M33

Wenlong Yuan·Lucas M. Macri·Atefeh Javadi·Zhenfeng Lin·Jianhua Z. Huang
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Abstract

We analyze sparsely-sampled near-infrared (JHKs) light curves of a sample of 1781 Mira variable candidates in M33, originally discovered using I-band time-series observations. We extend our single-band semi-parametric Gaussian process modeling of Mira light curves to a multi-band version and obtain improved period determinations. We use our previous results on near-infrared properties of candidate Miras in the LMC to classify the majority of the M33 sample into Oxygen- or Carbon-rich subsets. We derive Period-Luminosity relations for O-rich Miras and determine a distance modulus for M33 of 24.80 +- 0.06 mag.

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Wenlong Yuan, Lucas M. Macri, Atefeh Javadi, Zhenfeng Lin, Jianhua Z. Huang. 2018-07-10. Near-infrared Mira Period-Luminosity Relations in M33. https://doi.org/10.3847/1538-3881%2Faad330

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