Stellar Atmospheric Parameters: The Four-Step Program and Gaia's Radial Velocity Spectrometer

Details Stellar Atmospheric Parameters: The Four-Step Program and Gaia's Radial Velocity Spectrometer Stellar Atmospheric Parameters: The Four-Step Program and Gaia's Radial Velocity Spectrometer

2008-10-22

arxiv.org/abs/0810.4100v1

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures, to appear in the proceedings of the conference Classification and Discovery in Large Astronomical Surveys,

Scientific paper

10.1063/1.3059081

The determination of atmospheric parameters is the first and most fundamental step in the analysis of a stellar spectrum. Current and forthcoming surveys involve samples of up to several million stars, and therefore fully automated approaches are required to handle not just data reduction but also the analysis, and in particular the determination of atmospheric parameters. We propose that a successful methodology needs, at the very least, to pass a series of consistency tests that we dub the 'four-step program'. This and related issues are discussed in some detail in the context of the massive data set to be obtained with the Radial Velocity Spectrometer onboard Gaia

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