The Hermes Echelle Spectrograph
The main driver for this instrument is stellar physics covering a broad range of applications going from complementary characterization of targets observed in space to fundamental parameter and abundance determinations of a large diversity of individual stars in all evolutionary stages as well as the (long-term) monitoring of the radial velocity of variable stars and binary or multiple systems. HERMES is a high-resolution spectrograph which records the optical spectrum in the range lambda = 377-900 nm across 55 spectral orders in a single exposure (fig. 3). Its spectral resolution is 63 000 in the LRF mode and 85 000 in the HRF mode.