C. Turon, F. Meynadier and F. Arenou (eds)
EAS Publications Series, 45 (2010) 181-188
The Gaia spectroscopic instrument (RVS): a technical challenge
Mullard Space Science Laboratory, University College London,
Holmbury St Mary,
2 GEPI, Observatoire de Paris Meudon, 5 place Jules Janssen, 92190 Meudon, France
The lack of radial velocity data in the Hipparcos catalogue was considered a significant deficiency, so when Gaia was conceived, a spectrometer was a core constituent of its payload. The Gaia Radial Velocity Spectrometer faced a number of design challenges, in particular set by the need to balance kinematic and astrophysical capability. We present an overview of the evolution of the instrument to its present form, identifying the competing technical, performance and programmatic factors which have shaped it.
© EAS, EDP Sciences 2011