Milky Way archaeology using RR Lyrae and type II Cepheids I. The Orphan stream in 7D using RR Lyrae stars

We present a chemo-dynamical study of the Orphan stellar stream using a catalog of RR~Lyrae pulsating variable stars for which photometric, astrometric, and spectroscopic data are available. Employing low-resolution spectra from the Sloan Digital Sky Survey (SDSS), we determined line-of-sight veloci...

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Veröffentlicht in:	arXiv.org 2021-02
Hauptverfasser:	Prudil, Z, Hanke, M, Lemasle, B, Crestani, J, Braga, V F, Fabrizio, M, Koch-Hansen, A J, Bono, G, Grebel, E K, Matsunaga, N, Marengo, M, da Silva, R, Dall'Ora, M, Martínez-Vázquez, C E, G Altavilla, Lala, H, Chaboyer, B, Ferraro, I, Fiorentino, G, Gilligan, C, Nonino, M, Thévenin, F
Format:	Artikel
Sprache:	eng
Schlagworte:	Archaeology Astrometry Cepheid variables Chemical analysis Dwarf galaxies Horizontal branch stars Kinematics Line of sight Metallicity Physics - Astrophysics of Galaxies Physics - Solar and Stellar Astrophysics Red giant stars Sky surveys (astronomy) Spectroscopy Variable stars
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