Variation of the galactic force law in the region of the sun

Details Variation of the galactic force law in the region of the sun Variation of the galactic force law in the region of the sun

Jun 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974prama...2..336a&link_type=abstract

Pramana, vol. 2, June 1974, p. 336-340.

Physics

Galactic Rotation, Gravitational Fields, Radial Velocity, Stellar Motions, B Stars, Galactic Nuclei, Milky Way Galaxy, O Stars, Solar Position

Scientific paper

From the radial velocity data for O-B5 stars within 3 kpc of the sun, the variation of the semi-axes Sigma-1 and Sigma-2 of the velocity ellipsoid in the solar region is estimated. It is found that both the semi-axes as well as their ratio Sigma-2/Sigma-1 decrease away from the galactic center. The value of Sigma-2/Sigma-1 changes from 1.17 at R = 9 kpc to 0.48 at R = 11 kpc passing through a value of 0.86 at the solar distance of 10 kpc. These results are consistent with the usually assumed inverse square law of force in the outer regions of the galaxy.

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