On a New Method to Estimate the Distance, Reddening, and Metallicity of RR Lyrae Stars Using Optical/Near-infrared (B, V, I, J, H, K) Mean Magnitudes: ω Centauri as a First Test Case

• Published in: The Astrophysical journal Vol. 870; no. 2; p. 115
• Main Authors: Bono, G., Iannicola, G., Braga, V. F., Ferraro, I., Stetson, P. B., Magurno, D., Matsunaga, N., Beaton, R. L., Buonanno, R., Chaboyer, B., Dall’Ora, M., Fabrizio, M., Fiorentino, G., Freedman, W. L., Gilligan, C. K., Madore, B. F., Marconi, M., Marengo, M., Marinoni, S., Marrese, P. M., Martinez-Vazquez, C. E., Mateo, M., Monelli, M., Neeley, J. R., Nonino, M., Sneden, C., Thevenin, F., Valenti, E., Walker, A. R.
• Format: Journal Article
• Language: English
• Published: Philadelphia IOP Publishing 10.01.2019; American Astronomical Society
• Subjects: Astrophysics; Clusters; Current distribution; Estimates; Iron; Luminosity; Metal content; Metallicity; Physics; Standard deviation; Stars

Abstract We developed a new approach to provide accurate estimates of the metal content, reddening, and true distance modulus of RR Lyrae stars (RRLs). The method is based on homogeneous optical ( BVI ) and near-infrared ( JHK ) mean magnitudes and on predicted period–luminosity–metallicity relation...