The RAVE Survey: Constraining the Local Galactic Escape Speed

@article{Smith2006TheRS,
  title={The RAVE Survey: Constraining the Local Galactic Escape Speed},
  author={M. C. Smith and Gregory R. Ruchti and Amina Helmi and Rosemary F. G. Wyse and Jon P. Fulbright and Kenneth C. Freeman and Julio F. Navarro and George Seabroke and Matthias Steinmetz and M. E. Williams and Olivier Bienaym{\'e} and James Binney and J. Bland-Hawthorn and Walter Dehnen and Brad K. Gibson and Gerry Gilmore and E. K. Grebel and U. Munari and Quentin A. Parker and Ralf-Dieter Scholz and Arnaud Siebert and Fred G. Watson and Toma{\vz} Zwitter},
  journal={Proceedings of the International Astronomical Union},
  year={2006},
  volume={2},
  pages={137 - 137}
}
Abstract We report new constraints on the local escape speed of our Galaxy. Our analysis is based on a sample of high velocity stars from the RAVE survey and two previously published datasets (the Geneva-Copenhagen survey and the Beers et al. catalogue of metal-poor stars). We use cosmological simulations of disk galaxy formation to motivate our assumptions on the shape of the velocity distribution, allowing for a significantly more precise measurement of the escape velocity compared to… 

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References

SHOWING 1-10 OF 81 REFERENCES

The Geneva–Copenhagen Survey of the Solar Neighbourhood

Abstract We report on a new survey of metallicities, ages, and Galactic orbits for a complete, magnitude-limited, and kinematically unbiased all-sky sample of 16 682 nearby F- and G-dwarfs. Our ∼ 63

The Mass of the Milky Way: Limits from a newly assembled set of halo objects

We set new limits on the mass of the Milky Way, making use of the latest kinematic information for Galactic satellites and halo objects. Our sample consists of 11 satellite galaxies, 137 globular

Mapping the Galactic Halo. I. The “Spaghetti” Survey

We describe a major survey of the Milky Way halo designed to test for kinematic substructure caused by destruction of accreted satellites. We use the Washington photometric system to identify halo

Hypervelocity Stars. I. The Spectroscopic Survey

We discuss our targeted search for hypervelocity stars (HVSs), stars traveling with velocities so extreme that dynamical ejection from a massive black hole is their only suggested origin. Our survey,

The velocity dispersion and mass profile of the Milky Way

We re-analyse the velocity-dispersion profile σ(r) at radii r > 10kpc in the Galactic stellar halo, recently derived by Battaglia et al., who concluded that, for a constant velocity anisotropy of the

The mass of the Milky Way galaxy

We use the Jaffe model as a global mass distribution for the Galaxy and determine the circular velocity $v_c$ and the Jaffe radius $r_j$ using the satellites of the Galaxy, estimates of the local

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) stars

Accretion relics in the solar neighbourhood : Debris from ωCen's parent galaxy

We use numerical simulations to investigate the orbital characteristics of tidal debris from satellites whose orbits are dragged into the plane of galact ic disks by dynamical friction before

The present and future mass of the Milky Way halo

A simple model for the Milky Way halo is presented. It has a flat rotation curve in the inner regions, but the density falls off sharply beyond an outer edge. This truncated, flat rotation curve (TF)

Kinematics of Metal-poor Stars in the Galaxy. II. Proper Motions for a Large Nonkinematically Selected Sample

We present a revised catalog of 2106 Galactic stars, selected without kinematic bias and with available radial velocities, distance estimates, and metal abundances in the range -4.0 ≤ [Fe/H] ≤ 0.0.
...