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On the Use of Field RR Lyrae as Galactic Probes. III. The $alpha$-element abundances. (arXiv:2104.08113v1 [astro-ph.GA])

Volume 16, Issue 17 - article #2
J. Crestani (1,2,3), V.F. Braga (3,4), M. Fabrizio (3,4), G. Bono (2,3), C. Sneden (5), G.W. Preston (6), I. Ferraro (3), G. Iannicola (3), M. Nonino (7), G. Fiorentino (3), F. Thévenin (8), B. Lemasle (9), Z. Prudil (8), A. Alves-Brito (1), G. Altavilla (3,4), B. Chaboyer (10), M. Dall'Ora (11), V. D'Orazi (12,13), C.K. Gilligan (10), E. Grebel (8), A.J. Koch-Hansen (9), H. Lala (9), M. Marengo (14), S. Marinoni (3,4), P.M. Marrese (3,4), C.E. Martínez-Vázquez (15), N. Matsunaga (16), M. Monelli (17), J.P. Mullen (14), J. Neeley (18), R. da Silva (3,4), P.B. Stetson (19), M. Salaris (20), J. Storm (21), E. Valenti (22), M. Zoccali (23,24) ((1) Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil, (2) Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy, (3) INAF-Osservatorio Astronomico di Roma, Monte Porzio Catone, Italy, (4) Space Science Data Center, Roma, Italy, (5) Department of Astronomy, McDonald Observatory, The University of Texas, Austin, TX, USA, (6) The Observatories of the Carnegie Institution for Science, Pasadena, CA, USA, (7) INAF-Osservatorio Astronoico di Trieste, Trieste, Italy, (8) Université de Nice Sophia-antipolis, CNRS, Observatoire de la Côte d'Azur, Laboratoire Lagrange, Nice, France, (9) Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Heidelberg, Germany, (10) Department of Physics, Astronomy, Dartmouth College, Hanover, USA, (11) INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy, (12) INAF-Osservatorio Astronomico di Padova, Padova, Italy, (13) School of Physics, Astronomy, Monash University, Clayton, Melbourne, Australia, (14) Department of Physics, Astronomy, Iowa State University, Ames, IA, USA, (15) Cerro Tololo Inter-American Observatory, NSF's National Optical-Infrared Astronomy Research Laboratory, La Serena, Chile, (16) Department of Astronomy, The University of Tokyo, Tokyo, Japan, (17) Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, (18) Department of Physics, Florida Atlantic University, Boca Raton, FL, USA, (19) Herzberg Astronomy, Astrophysics, National Research Council, Victoria, BC, Canada, (20) Astrophysics Research Institute, Liverpool John Moores University, Liverpool, UK, (21) Leibniz-Institut für Astrophysik Potsdam, Potsdam, Germany, (22) European Southern Observatory, Garching bei Munchen, Germany, (23) Instituto Milenio de Astrofísica, Santiago, Chile, (24) Pontificia Universidad Catolica de Chile, Instituto de Astrofisica, Santiago, Chile)
http://arxiv.org/abs/2104.08113