Scientific Results

The gas absorption cell for GIANO-TNG

Year: 2006

Authors: D’Amato F., Oliva E., Origlia L.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Largo. E. Fermi 6, 50125 Firenze, Italy;
INAF – Osservatorio di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy;
Telescopio Nazionale Galileo, calle A. de Abreu 70/1, 38700 S.Cruz de La Palma, Spain;
INAF – Osservatorio di Bologna, via Ranzani 1, 40127 Bologna, Italy

Abstract: GIANO is an high resolution cross-dispersed spectrometer operating at near IR wavelengths (0.9-2.5 microns). One of its primary aims is to measure radial velocities of cool stars with an accuracy of a few m/sec. To this purpose, the spectrometer requires a gas absorption cell which should ideally produce several hundreds of measurable lines distributed over the whole wavelengths range. We show that this can be conveniently achived using a combination of halogen hydrates, namely HCl, HBr and HI. We present and discuss the design and development of such a cell.

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KeyWords: Halogen compounds; Hydrates; Infrared spectrometers; Optical resolving power; Space surveillance; Velocity measurement, Cool stars; Ground based infrared instrumentation; Halogen hydrates, Gas absorption
DOI: 10.1117/12.670375

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