Future Groundbased High-Resolution IR Spectrometers

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

After reviewing generally the current plans for high resolution infrared spectroscopy at large groundbased telescopes I will discuss in more detail the specific instruments under development for the ESO VLT on Paranal mountain in Chile. The first to be installed will be VISIR which will provide a variety of capabilities in the 8-28µm region including echelle spectroscopy at R ~ 30.000 in the 10µm atmospheric window. This will be followed by CRIRES a high resolution pre-dispersed echelle spectrograph designed to reach R ~ 100.000 over the wavelength range 1-5µm. A curvature sensing adaptive optics system feed is used to minimize slit losses and a 4096x512 pixel mosaic of Aladdin InSb array detectors is being developed to maximize the free spectral range covered in each order. Gas cells are being provided for the measurement of high precision radial velocities and a Fresnel rhomb plus Wollaston prism for magnetic Doppler imaging. Installation at the VLT is scheduled during the second half of 2004. I will review briefly some of the science goals of this instrument and discuss its expected capabilities and current development status.

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