Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.136..299n&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 136, no. 2, Aug. 1987, p. 299-314.
Astronomy and Astrophysics
Astrophysics
7
Eccentric Orbits, Galactic Rotation, Milky Way Galaxy, Coronas, Escape, Mass, Radii
Scientific paper
An analysis of the data concerning high-velocity stars from Eggen's catalogue aimed at a determination of the approximate slope of the mass function for the spherical component of our Galaxy, and at estimating the local circular velocity, as well as the local rotation velocity, as by-products, has been performed. The conclusions are that: a linear dependence of the mass on the radius is very likely; the value of the limiting radius is most likely equal to (40±10) kpc; the two local velocities are approximately equal to each other, being both equal to (230±30) km s-1; the local escape velocity appears to be the most likely equal to (520±30) km s-1; the total mass of a corona, obtained in this way, is (5±1)×1011M_sun;.
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