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 0.9-1.35 μm. We summarize here the characteristics of the instrument, the data acquisition and reduction, and preliminary results.
WINERED as a Stepping Stone for the Cosmic Distance Scale / Monelli, Matteo; Magurno, Davide; Bono, Giuseppe; Matsunaga, Noriyuki. - ELETTRONICO. - 6:(2018), pp. 186-190. (Intervento presentato al convegno The RR Lyrae 2017 Conference. Revival of the Classical Pulsators: from Galactic Structure to Stellar Interior Diagnostics tenutosi a Niepolomice, Poland nel 2017 September 17 - 2017 September 21).
WINERED as a Stepping Stone for the Cosmic Distance Scale
Magurno, Davide;
2018
Abstract
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 0.9-1.35 μm. We summarize here the characteristics of the instrument, the data acquisition and reduction, and preliminary results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
