Temperature calibration from the InfraRed Flux Method in the Gaia system
We implement Gaia and 2MASS photometry in the InfraRed Flux Method and apply it to stars across different evolutionary status in the GALAH DR3 survey. We derive colour-effective temperature relations that take into account the effect of metallicity and surface gravity over the range 3600 - 9000 K. Comparison against solar-twins, Gaia benchmark stars and the latest interferometric measurements validates the precision and accuracy of these calibrations for spectral types later than F. We assess the impact of various sources of uncertainties and provide guidelines to use our relations.
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