Two Fabry-Perot interferometers for high precision wavelength calibration in the near-infrared

摘要

strongstrongThe most frequently used standard light sources for spectroscopic high precision wavelength calibration arehollow cathode lamps. These lamps, however, do not provide homogeneous line distribution and intensities.Particularly in the infrared, the number of useful lines is severely limited and the spectrum is contaminated bylines of the filler gas. With the goal of achieving sub m/s stability in the infrared, as required for detectingearthlike extra-solar planets, we are developing two passively stabilized Fabry-Perot interferometers for the redvisible (600-1050nm) and near infrared wavelength regions (900-1350nm). Each of the two interferometers canproduce ~15,000 lines of nearly constant brightness. The Fabry-Perot interferometers aim at a RV calibrationprecision of 10cm/s and are optimized in line shape and spacing for the infrared planet hunting CARMENESspectrograph that is currently being built for the Calar Alto 3.5m telescope. Here we present the first results ofour work./strong/strong© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.