WINERED as a Stepping Stone for the Cosmic Distance Scale

Matteo Monelli, Davide Magurno, Giuseppe Bono, Noriyuki Matsunaga and OSIRIS collaboration

We present the Oscillating Stars with wIneRed near-Infrared Spectroscopy (OSIRIS) project, aimed at deriving accurate chemical abundances of primary distance indicators covering a wide age range from young Classical Cepheids to intermediate- age Anomalous Cepheids and Miras, old RR Lyrae stars, and Type-II Cepheids. High-resolution near-infrared spectra will be collected with WINERED, a Japanese instrument with the highest available throughput in the range 0.9-1.35μm. We summarize here the characteristics of the instrument, the data acquisition and reduction, and preliminary results.

Proceedings of the Polish Astronomical Society, vol. 6, 186-190 (2018)

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