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Proceedings Paper

Concepts for a high-resolution multi-object spectrograph for galactic archeology on the Anglo-Australian Telescope
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Paper Abstract

Mapping out stellar families to trace the evolutionary star formation history of the Milky Way requires a spectroscopic facility able to deliver high spectral resolution (R≥30k) with both good wavelength coverage (~400 Ang) and target multiplex advantage (~400 per 2 degree field). Such a facility can survey 1,200,000 bright stars over 10,000 square degrees in about 400 nights with a 4-meter aperture telescope. Presented are the results of a conceptual design study for such a spectrograph, which is under development as the next major instrument for the Anglo-Australian Observatory. The current design (that builds upon the AAOmega system) makes use of a White Pupil collimator and an R3 echelle that is matched to the existing AAOmega cameras. The fibre slit can be reconfigured to illuminate the Pupil relay side of the collimator mirror bypassing the echelle, thus preserving the lower dispersion modes of the AAOmega spectrograph. Other spectrograph options initially considered include use of an anamorphic collimator that reduces the required dispersion to that achievable with VPH grating technology or possible use of a double-pass VPH grating.

Paper Details

Date Published: 11 July 2008
PDF: 12 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70144J (11 July 2008);
Show Author Affiliations
Samuel C. Barden, Anglo-Australian Observatory (Australia)
Joss Bland-Hawthorn, The Univ. of Sydney (Australia)
Vladimir Churilov, Anglo-Australian Observatory (Australia)
Simon Ellis, Anglo-Australian Observatory (Australia)
Tony Farrell, Anglo-Australian Observatory (Australia)
Ken C. Freeman, Research School of Astronomy & Astrophysics, Mount Stromlo Observatory (Australia)
Roger Haynes, Anglo-Australian Observatory (Australia)
Anthony Horton, Anglo-Australian Observatory (Australia)
Damien J. Jones, Prime Optics (Australia)
Greg Knight, Sinclair Knight Merz (Australia)
Stan Miziarski, Anglo-Australian Observatory (Australia)
William Rambold, Anglo-Australian Observatory (Australia)
Greg Smith, Anglo-Australian Observatory (Australia)
Lew Waller, Anglo-Australian Observatory (Australia)

Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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