Metallicity of RR Lyrae stars from the Gaia Data Release 3 catalogue computed with Machine Learning algorithms

Tatiana Muraveva, Andrea Giannetti, Gisella Clementini +2

We present new $P-{\varphi }_{31}-[Fe/H]$ and $P-{\varphi }_{31}-A_2-[Fe/H]$ relations for fundamental-mode (RRab) and first-overtone mode (RRc) RR Lyrae stars (RRLs), respectively.…