On the ellipticity of the Galactic disk

Details On the ellipticity of the Galactic disk On the ellipticity of the Galactic disk

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasp..104..809k&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 104, no. 679, p. 809-811.

Astronomy and Astrophysics

Astronomy

4

Elliptical Galaxies, Galactic Structure, Gravitational Fields, Milky Way Galaxy, Solar Neighborhood, Halos, Polar Coordinates, Radial Velocity

Scientific paper

We investigate the available kinematic constraints on the ellipticity of the Galactic disk. In the solar neighborhood the only suggestion for nonaxisymmetry is an anomalous value for the ratio of tangential to radial-velocity dispersions. This can be explained by postulating that the Galactic disk is slightly elliptical, and that the sun lies near a symmetry axis of the disk. The observed asymmetries of the large-scale gas distribution in the Galaxy are also briefly discussed.

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