Empirical photometric calibration of the Gaia red clump: Colours, effective temperature, and absolute magnitude

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Fig. 2

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TGAS HR diagram with parallax precision ≤10%, σ_G< 0.01, E_{B − V}< 0.015, and 2MASS JK_s-bands high photometric quality (data available in Table A.1, Appendix A). The non-shaded region corresponds to the selection of red giants with G−K_s> 1.6 and M_G< 4.0.

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