On the Shoulders of Giants: Properties of the Stellar Halo and the Milky Way Mass Distribution

@article{Kafle2014OnTS,
  title={On the Shoulders of Giants: Properties of the Stellar Halo and the Milky Way Mass Distribution},
  author={Prajwal R Kafle and Sanjib Sharma and Geraint F. Lewis and Joss Bland-Hawthorn},
  journal={The Astrophysical Journal},
  year={2014},
  volume={794},
  pages={59}
}
Halo stars orbit within the potential of the Milky Way, and hence their kinematics can be used to understand the underlying mass distribution. However, the inferred mass distribution depends sensitively on assumptions made on the density and the velocity anisotropy profiles of the tracer population. Also, there is a degeneracy between the parameters of the halo and those of the disk or bulge. Most previous attempts that use halo stars have made arbitrary assumptions about these. In this paper… Expand
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  • Proceedings of the International Astronomical Union
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References

SHOWING 1-10 OF 125 REFERENCES
KINEMATICS OF THE STELLAR HALO AND THE MASS DISTRIBUTION OF THE MILKY WAY USING BLUE HORIZONTAL BRANCH STARS
Here we present a kinematic study of the Galactic halo out to a radius of ∼ 60 kpc, using 4664 blue horizontal branch (BHB) stars selected from the SDSS/SEGUE survey, to determine key dynamicalExpand
The Masses of the Milky Way and Andromeda galaxies
We present a family of robust tracer mass estimators to compute the enclosed mass of galaxy haloes from samples of discrete positional and kinematical data of tracers, such as halo stars, globularExpand
Very Metal-Poor Outer-Halo Stars with Round Orbits
The orbital motions of halo stars in the Milky Way reflect the orbital motions of the progenitor systems in which they formed, making it possible to trace the mass-assembly history of the Galaxy.Expand
Rotation Curve of the Milky Way out to ~200 kpc
The rotation curve (RC) of our Galaxy, the Milky Way, is constructed starting from its very inner regions (few hundred parsecs) out to a large galactocentric distance of ~200 kpc using kinematicalExpand
Milky Way mass models for orbit calculations
Studying the trajectories of objects like stars, globular clusters or satellite galaxies in the Milky Way allows to trace the dark matter halo but requires reliable models of its gravitationalExpand
Velocity Dispersion Profile of the Milky Way Halo
We present a spectroscopic sample of 910 distant halo stars from the Hypervelocity Star survey from which we derive the velocity dispersion profile of the Milky Way halo. The sample is a mix of 74%Expand
The Milky Way stellar halo out to 40 kpc: squashed, broken but smooth
We introduce a new maximum-likelihood method to model the density profile of blue horizontal branch and blue straggler stars and apply it to the Sloan Digital Sky Survey Data Release 8 photometricExpand
The radial velocity dispersion profile of the Galactic halo : constraining the density profile of the dark halo of the Milky Way
We have compiled a new sample of 240 halo objects with accurate distance and radial velocity measurements, including globular clusters, satellite galaxies, field blue horizontal branch (FHB) starsExpand
Satellites of simulated galaxies: survival, merging and their relationto the dark and stellar haloes
We study the population of satellite galaxies formed in a suite of N-body/gasdynamical simulations of galaxy formation in a A cold dark matter universe. The simulations resolve nearly 10 mostExpand
Quantifying Kinematic Substructure in the Milky Way's Stellar Halo
We present and analyze the positions, distances, and radial velocities for over 4000 blue horizontal-branch (BHB) stars in the Milky Way's halo, drawn from SDSS DR8. We search for position-velocityExpand
...
1
2
3
4
5
...