On the Use of Field RR Lyrae as Galactic Probes. II. A new $Δ$S calibration to estimate their metallicity

@misc{matsunaga2020usefieldrr,
      title={On the Use of Field RR Lyrae as Galactic Probes. II. A new $Δ$S calibration to estimate their metallicity},
      author={N. Matsunaga and M. Zoccali and Z. Prudil and F. Thévenin and P.M. Marrese and V. D'Orazi and G. Altavilla and M. Fabrizio and S. Marinoni and M. Marengo and M. Nonino and R. da Silva and G. Iannicola and B. Chaboyer and M. Monelli and G. Bono and M. Dall'Ora and A.R. Walker and C. Sneden and A. Alves-Brito and I. Ferraro and J. Neeley and G. Fiorentino and J. Storm and E. Valenti and L. Inno and B. Lemasle and E. Grebel and V.F. Braga and J. Crestani and G.W. Preston and H. Lala and C.K. Gilligan and C.E. Martínez-Vázquez and J.P. Mullen and P.B. Stetson},
      year={2020},
      eprint={2012.02284},
      archivePrefix={arXiv},
      primaryClass={astro-ph.SR},
      url={https://arxiv.org/abs/2012.02284},
}