Results 11 to 20 of about 217,419 (251)
Microlensing Optical Depth and Event Rate toward the Galactic Bulge from 8 yr of OGLE-IV Observations [PDF]
Astrophysical Journal, Supplement Series, 2019 The number and properties of observed gravitational microlensing events depend on the distribution and kinematics of stars and other compact objects along the line of sight.
P. Mróz +11 more
semanticscholar +3 more sources
Globular Clusters in the Galactic Bulge [PDF]
Publications of the Astronomical Society of Australia, 2016 AbstractA view of the Galactic bulge by means of their globular clusters is fundamental for a deep understanding of its formation and evolution. Connections between the globular cluster and field star properties in terms of kinematics, orbits, chemical abundances, and ages should shed light on different stellar population components.
Bica, E., ORTOLANI, SERGIO, Barbuy, B.
openaire +5 more sources
Star formation history of the Galactic bulge from deep HST imaging of low reddening windows [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Despite the huge amount of photometric and spectroscopic efforts targetting the Galactic bulge over the past few years, its age distribution remains controversial owing to both the complexity of determining the age of individual stars and the difficult ...
E. Bernard +5 more
semanticscholar +3 more sources
Chemical characterization of the inner Galactic bulge:North–South symmetry [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 While the number of stars in the Galactic bulge with detailed chemical abundance measurements is increasing rapidly, the inner Galactic bulge (|b| +0.6 dex.
G. Nandakumar +12 more
semanticscholar +3 more sources
The Chemical Composition of the Galactic Bulge and Implications for its Evolution [PDF]
Publications of the Astronomical Society of Australia, 2016 At a bulge latitude of b = −4°, the average [Fe/H] and [Mg/H] values are +0.06 and +0.17 dex, roughly 0.2 and 0.7 dex higher than the local thin and thick disk values, respectively, suggesting a large bulge effective yield, perhaps due to efficient ...
A. McWilliam
semanticscholar +3 more sources
The 3D Structure of the Galactic Bulge [PDF]
Publications of the Astronomical Society of Australia, 2016 We review the observational evidences concerning the three-dimensional structure of the Galactic bulge. Although the inner few kpc of our Galaxy are normally referred to as the bulge, all the observations demonstrate that this region is dominated by a ...
M. Zoccali, E. Valenti
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Correlations between Kinematics and Metallicity in the Galactic Bulge: A Review [PDF]
Publications of the Astronomical Society of Australia, 2016 Recent large-scale surveys of galactic bulge stars allowed to build a detailed map of the bulge kinematics. The bulge exhibits cylindrical rotation consistent with a disky origin which evolved through bar-driven secular evolution.
C. Babusiaux
semanticscholar +3 more sources
The Ages of Galactic Bulge Stars with Realistic Uncertainties [PDF]
Astrophysical Journal, 2022 Using modern isochrones with customized physics and carefully considered statistical techniques, we recompute the age distribution for a sample of 91 microlensed dwarfs in the Galactic bulge presented by Bensby et al.
M. Joyce +5 more
semanticscholar +1 more source
A Parametric Galactic Model toward the Galactic Bulge Based on Gaia and Microlensing Data [PDF]
, 2021 We developed a parametric Galactic model toward the Galactic bulge by fitting to spatial distributions of the Gaia DR2 disk velocity, VVV proper motion, BRAVA radial velocity, OGLE-III red clump star count, and OGLE-IV star count and microlens rate ...
N. Koshimoto, J. Baba, D. Bennett
semanticscholar +1 more source
Kinematics of RR Lyrae stars in the Galactic bulge with OGLE-IV and Gaia DR2 [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We analyse the kinematics and spatial distribution of 15 599 fundamental-mode RR Lyrae (RRL) stars in the Milky Way bulge by combining OGLE-IV photometric data and Gaia DR2 proper motions.
Hangci Du +5 more
semanticscholar +1 more source