The Gaia Spectroscopic Instrument (RVS): A Technical Challenge
Mark Cropper, David Katz
TL;DR
The Gaia RVS instrument was developed to address the lack of radial velocity data in previous catalogs, facing numerous technical challenges to balance various scientific and engineering requirements.
Contribution
This paper provides a comprehensive overview of the design evolution and technical challenges of the Gaia Radial Velocity Spectrometer.
Findings
Instrument design evolved to meet conflicting technical and scientific goals
Key technical challenges were identified and addressed during development
The RVS enhances Gaia's capability to measure stellar radial velocities
Abstract
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.
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