Ultra-Stable High Resolution Spectrographs for Large Telescopes

F. Diego, I. A. Crawford, D. D. Walker

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

This short contribution presents the demanding requirements of scientific cases for ultra-high stability spectrography, from the study of subtle radial velocity changes induced by asteroseismology to the ones produced by extra-solar planetary companions. The analysis of physical conditions in cool interstellar clouds is presented as a typical application of ultra-high resolution spectrography. The main technical challenges associated with such instruments are outlined, including focal stations and light feeding methods. As a possible way to combine both modes in a single instrument, we describe a design case for the ultra-stable high resolution spectrograph that we are proposing for the Gemini south telescope, specified to detect radial velocity variations down to one meter per second and also to achieve near diffraction-limited spectral resolution approaching one million. This versatile instrument would occupy an insulated room in the pier of the telescope and would be fed initially by an optical fibre coming from the Cassegrain focal station.

LanguageEnglish
Pages218-224
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3355
DOIs
Publication statusPublished - 9 Jul 1998
Externally publishedYes
EventOptical Astronomical Instrumentation - Kona, United States
Duration: 26 Mar 199826 Mar 1998

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Spectrographs
Spectrograph
Telescopes
spectrographs
Telescope
Radial velocity
High Resolution
telescopes
radial velocity
high resolution
stations
wharves
asteroseismology
Piers
Spectral resolution
Spectral Resolution
Antenna feeders
spectral resolution
Optical Fiber
rooms

Cite this

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abstract = "This short contribution presents the demanding requirements of scientific cases for ultra-high stability spectrography, from the study of subtle radial velocity changes induced by asteroseismology to the ones produced by extra-solar planetary companions. The analysis of physical conditions in cool interstellar clouds is presented as a typical application of ultra-high resolution spectrography. The main technical challenges associated with such instruments are outlined, including focal stations and light feeding methods. As a possible way to combine both modes in a single instrument, we describe a design case for the ultra-stable high resolution spectrograph that we are proposing for the Gemini south telescope, specified to detect radial velocity variations down to one meter per second and also to achieve near diffraction-limited spectral resolution approaching one million. This versatile instrument would occupy an insulated room in the pier of the telescope and would be fed initially by an optical fibre coming from the Cassegrain focal station.",
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Ultra-Stable High Resolution Spectrographs for Large Telescopes. / Diego, F.; Crawford, I. A.; Walker, D. D.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 3355, 09.07.1998, p. 218-224.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Ultra-Stable High Resolution Spectrographs for Large Telescopes

AU - Diego, F.

AU - Crawford, I. A.

AU - Walker, D. D.

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