On the Use of Field RR Lyrae As Galactic Probes: IV. New Insights Into and Around the Oosterhoff Dichotomy

We discuss the largest and most homogeneous spectroscopic data set of field RR Lyrae variables (RRLs) available to date. We estimated abundances using both high-resolution and low-resolution ( Δ S method) spectra for fundamental (RRab) and first overtone (RRc) RRLs. The iron abundances for 7941 RRLs...

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Veröffentlicht in:	The Astrophysical journal 2021-10, Vol.919 (2), p.118
Hauptverfasser:	Fabrizio, M., Braga, V. F., Crestani, J., Bono, G., Ferraro, I., Fiorentino, G., Iannicola, G., Preston, G. W., Sneden, C., Thévenin, F., Altavilla, G., Chaboyer, B., Dall’Ora, M., da Silva, R., Grebel, E. K., Gilligan, C. K., Lala, H., Lemasle, B., Magurno, D., Marengo, M., Marinoni, S., Marrese, P. M., Martínez-Vázquez, C. E., Matsunaga, N., Monelli, M., Mullen, J. P., Neeley, J., Nonino, M., Prudil, Z., Salaris, M, Stetson, P. B., Valenti, E., Zoccali, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Abundance Amplitudes Astronomy & Astrophysics ASTRONOMY AND ASTROPHYSICS Astrophysics Globular clusters Iron Metallicity Metals Milky Way stellar halo Physics RR Lyrae variable stars Spectroscopy
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