Transiting Exoplanet Yields for the Roman Galactic Bulge Time Domain Survey Predicted from Pixel-level Simulations [PDF]
The Astrophysical Journal Supplement Series, 2023 The Nancy Grace Roman Space Telescope (Roman) is NASA’s next astrophysics flagship mission, expected to launch in late 2026. As one of Roman’s core community science surveys, the Galactic Bulge Time Domain Survey (GBTDS) will collect photometric and ...
Robert F. Wilson +10 more
doaj +2 more sources
The Ages of Galactic Bulge Stars with Realistic Uncertainties [PDF]
The Astrophysical Journal, 2023 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.
Meridith Joyce +5 more
doaj +2 more sources
The COMBS survey I : Chemical Origins of Metal-Poor Stars in the Galactic Bulge [PDF]
Monthly notices of the Royal Astronomical Society, 2019 19 pages, 5 tables, accepted to MNRASChemistry and kinematic studies can determine the origins of stellar population across the Milky Way. The metallicity distribution function of the bulge indicates that it comprises multiple populations, the more metal-
Asplund, Martin +9 more
core +5 more sources
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
Comparing the galactic bulge and galactic disk millisecond pulsars [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 The Galactic Center Excess (GCE) is an extended gamma-ray source in the central region of the Galaxy found in Fermi Large Area Telescope (Fermi-LAT) data.
H. Ploeg +3 more
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
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 +1 more source
Strong evidence that the galactic bulge is shining in gamma rays [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 There is growing evidence that the Galactic Center Excess identified in the Fermi-LAT gamma-ray data arises from a population of faint astrophysical sources.
O. Macias +5 more
semanticscholar +1 more source
NuSTAR tests of sterile-neutrino dark matter: New Galactic bulge observations and combined impact [PDF]
Physical Review D, 2019 We analyze two dedicated NuSTAR observations with exposure ${\sim}190$ ks located ${\sim}10^\circ$ from the Galactic plane, one above and the other below, to search for x-ray lines from the radiative decay of sterile-neutrino dark matter.
B. Roach +6 more
semanticscholar +1 more source
Dynamical modelling of the galactic bulge and bar: the Milky Way's pattern speed, stellar and dark matter mass distribution [PDF]
, 2016 We construct a large set of dynamical models of the galactic bulge, bar and inner disk using the Made-to-Measure method. Our models are constrained to match the red clump giant density from a combination of the VVV, UKIDSS and 2MASS infrared surveys ...
Matthieu Portail +4 more
semanticscholar +1 more source