Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..560c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 96, Aug. 1988, p. 560-566.
Astronomy and Astrophysics
Astronomy
51
Escape Velocity, Galactic Rotation, Interstellar Matter, Milky Way Galaxy, Radial Velocity, Histograms, Mass To Light Ratios, Solar System, Southern Hemisphere, Stellar Color
Scientific paper
Recent work on identifying stars with extreme velocities in the Galaxy's rest frame is summarized. These stars provide a sample for future studies of the chemical history, as well as the frequency and characteristics, of spectroscopic binaries of the outer halo. The stars with the most extreme velocities in the three primary Galactic directions and in the Galaxy's rest frame are studied, and these velocities are used to estimate the local value of the Galactic escape velocity, which may be greater than 500 km/s. Assuming a flat rotation curve, this implies that the total Galactic mass exceeds that within the solar orbit by a factor of about 5, and that the Galaxy extends to about 45 kpc. The resultant mass-to-blue-light ratio is greater than about 25. Most of the mass (about two-thirds or more) is due to dark matter.
Carney Bruce W.
Laird John B.
Latham David W.
No associations
LandOfFree
A survey of proper-motion stars. V - Extreme-velocity stars and the local galactic escape velocity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A survey of proper-motion stars. V - Extreme-velocity stars and the local galactic escape velocity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A survey of proper-motion stars. V - Extreme-velocity stars and the local galactic escape velocity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1693339