Gaia Data Release 3
Open Access

Fig. 24.

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HRDs colour coded according to FLAME parameters. We note that the colour scale is linear and not a density plot. Top: lum_flame versus teff_gspphot colour coded according to evolstage_flame for stars with relative parallax errors of better than 10%. We applied the recommended FLAME filter for giants. Bottom: lum_flame_spec versus teff_gspspec colour coded according to age_flame_spec for stars with flags_gspspeclike ‘0000000000000%’. In the background, the red clump can be seen in grey. These have no age values associated with them. Even though we made selections on quality on certain parameters, there are still some artefacts that can be seen, such as the high-luminosity, low-Teff giants in the upper panel colour coded in yellow, or the high-luminosity low-mass main sequence stars in the lower panel. These artefacts can be removed by filtering on luminosity uncertainty, or requiring that the Teff from both GSP-Spec and GSP-Phot agree to within 300 K for example, or filtering on spectra S/N.

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