RR Lyrae Calibrations in the Light of Gaia

Jan Lub

In this presentation I review the impact of the Gaia DR1 TGas parallaxes on the RR Lyrae absolute magnitude calibrations on the period – K_s and W(B, V) relations I presented at the 2015 RR Lyrae Conference in Visegrad. A short and critical review of reddening determinations is given. Gaia gives me no reason to revise my calibrations. The dependence (slope) of the absolute visual magnitude M_V on metallicity is rederived and found to be in agreement with the old proposal by Sandage (!).

Proceedings of the Polish Astronomical Society, vol. 6, 176-180 (2018)

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