Near-IR High-Resolution Spectrograph WINERED in Chile and its Application to Stellar Astronomy

Monday, 04 December 2017 11:30 a.m. — noon MST

AURA Lecture Hall

NOIRLab South Colloquia
NORIYUKI MATSUNAGA (University of Tokio, Japan and NOAO South Visiting Astronomer)

WINERED is a near-IR spectrograph for   a wide wavelength coverage of 0.9-1.35 micron with the revolving power of 28,000. Higher resolution modes with the resolution up to 70,000 are available but for either Y (0.96-1.11 micron) or J (1.14-1.35 micron) at one time.    Since we brought WINERED to La Silla observatory in 20 December, we have made a few observing runs, 23 nights including engineering nights in total, with the NTT 3.58-meter telescope at La Silla in 2017. We are planning to keep the WINERED in Chile in the coming several years. Currently, we are working on the spectra collected with the NTT as well as those collected in Japan from 2012 to 2016 on various scientific goals.

I'll introduce the WINERED and its performance as well as scientific results on stellar astronomy including our plan to use hundreds of pulsating stars like RR Lyrs and Cepheids to study the structure and evolution of the Milky Way galaxy.