期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 428, 期 4, 页码 3660-3670出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts305
关键词
Galaxy: bulge; Galaxy: evolution; Galaxy: formation; Galaxy: kinematics and dynamics; stars: abundances
资金
- National Aeronautics and Space Administration
- National Science Foundation
- RSAA
- Australian Research Council [DP0988751, FT100100268, DP110100678]
- European Commission through the DAGAL Network [PITN-GA-2011-289313]
- ARC Federation Fellowship
- ARC Laureate Fellowship
- Chilean Centro de Astrofisica FONDAP [15010003]
- Hungarian Academy of Sciences
- Hungarian OTKA [K76816, MB08C 81013, K83790]
- Australian Research Council [DP0988751] Funding Source: Australian Research Council
We describe the motivation, field locations and stellar selection for the Abundances and Radial velocity Galactic Origins Survey (ARGOS) spectroscopic survey of 28 000 stars in the bulge and inner disc of the Milky Way galaxy across latitudes of b = -5 degrees to -10 degrees. The primary goal of this survey is to constrain the formation processes of the bulge and establish whether it is predominantly a merger or instability remnant. From the spectra (R = 11 000), we have measured radial velocities and determined stellar parameters, including metallicities and [alpha/Fe] ratios. Distances were estimated from the derived stellar parameters and about 14 000 stars are red giants within 3.5 kpc of the Galactic Centre. In this paper, we present the observations and analysis methods. Subsequent papers (III and IV) will discuss the stellar metallicity distribution and kinematics of the Galactic bulge and inner disc, and the implications for the formation of the bulge.
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