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Conference Papers Year : 2018

Calibration and characterisation of the Gaia Red Clump

Abstract

We present new empirical Colour-Colour and Effective Temperature-Colour Gaia Red Clump calibrations. The selected sample takes into account high photometric quality, good spectrometric metallicity, homogeneous effective temperatures and low interstellar extinctions. From those calibrations we developed a method to derive the absolute magnitude, temperature and extinction of the Gaia RC. We tested our colour and extinction estimates on stars with measured spectroscopic effective temperatures and Diffuse Interstellar Band (DIB) constraints. Within the Gaia Validation team these calibrations are also being used, together with asteroseismic constraints, to check the parallax zero-point with Red Clump stars.
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Dates and versions

obspm-04009782 , version 1 (01-03-2023)

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L. Ruiz-Dern, C. Babusiaux, F. Arenou, C. Danielski, C. Turon, et al.. Calibration and characterisation of the Gaia Red Clump. Astrometry and Astrophysics in the Gaia sky, Proceedings of the International Astronomical Union, IAU Symposium, 2018, à renseigner, Unknown Region. pp.313-316, ⟨10.1017/S1743921317006147⟩. ⟨obspm-04009782⟩
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