The velocity field of the outer galaxy

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galactic Rotation, Milky Way Galaxy, Velocity Distribution, Astronomical Catalogs, Galactic Nuclei, Galactic Structure, Mapping, Radial Velocity, Stellar Rotation

Scientific paper

The determination of the velocity field of the (outer) Galaxy and the determination of the rotation curve of our star system beyond the Sun are discussed. Perturbations in the rotation of stars and gas in the Galaxy (i.e., with respect to circular rotation) were mapped by expanding the sample of available objects to the Southern Hemisphere, in order to cover as large a part of the Galaxy as possible, to confirm the gentle rise determined mainly from Northern Hemisphere objects. A catalog of nebulous objects; CO observations of galactic nebulae; determination of distances to O, B, and A type stars in the Walraven photometric system; distances to galactic nebulae; and the velocity field of the outer galaxy and the distance to the galactic center are considered.

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