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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/10788476
Record Status
Checked
Record Id
10788476
Title
Design drivers for a wide-field multi-object spectrograph for the William Herschel Telescope
Contributors
M Balcells
,
C Benn
,
D Abrams
,
T Agocs
,
D Cano
,
I Pérez-Fournon
,
I Trujillo
,
D Carter
,
G Dalton (STFC Rutherford Appleton Lab., and Oxford Univ.)
,
I Lewis
,
I Tosh (STFC Rutherford Appleton Lab.)
,
S Trager
,
M Verheijen
,
A Helmi
,
R Peletier
,
K Westhall
,
M Jarvis
,
W Percival
,
S Feltzing
,
N Walton
,
A Brown
,
C Evans
,
R McLure
,
R Sharples
Abstract
Wide-field multi-object spectroscopy is a high priority for European astronomy over the next decade. Most 8-10m telescopes have a small field of view, making 4-m class telescopes a particularly attractive option for wide-field instruments. We present a science case and design drivers for a wide-field multi-object spectrograph (MOS) with integral field units for the 4.2-m William Herschel Telescope (WHT) on La Palma. The instrument intends to take advantage of a future prime-focus corrector and atmospheric-dispersion corrector (Agocs et al, this conf.) that will deliver a field of view 2 deg in diameter, with good throughput from 370 to 1,000 nm. The science programs cluster into three groups needing three different resolving powers R: (1) high-precision radial-velocities for Gaia-related Milky Way dynamics, cosmological redshift surveys, and galaxy evolution studies (R = 5,000), (2) galaxy disk velocity dispersions (R = 10,000) and (3) high-precision stellar element abundances for Milky Way archaeology (R = 20,000). The multiplex requirements of the different science cases range from a few hundred to a few thousand, and a range of fibre-positioner technologies are considered. Several options for the spectrograph are discussed, building in part on published design studies for E-ELT spectrographs. Indeed, a WHT MOS will not only efficiently deliver data for exploitation of important imaging surveys planned for the coming decade, but will also serve as a test-bed to optimize the design of MOS instruments for the future E-ELT. © 2010 Copyright SPIE - The International Society for Optical Engineering.
Organisation
STFC
,
RALSP
,
RALSP - ISD
Keywords
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Language
English (EN)
Type
Details
URI(s)
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Year
Journal Article
Proc SPIE
7735 (2010): 77357G. Is in proceedings of: Ground-based and Airborne Instrumentation for Astronomy III, an Diego, California, USA, 27th June 2010.
doi:10.1117/12.856947
2010
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