Interpretation of the non-circular motion near the galactic center

Details Interpretation of the non-circular motion near the galactic center Interpretation of the non-circular motion near the galactic center

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...128..426r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 128, no. 2, Dec. 1983, p. 426-428.

Astronomy and Astrophysics

Astrophysics

6

Barred Galaxies, Galactic Nuclei, Gas Dynamics, Interstellar Gas, Galactic Structure, Gas Expansion, Radial Velocity

Scientific paper

The expanding features observed close to the galactic center can be explained either as being produced by a genuine large scale expansion, or by gas moving in suitably oriented closed streamlines of approximately elliptical shape. Here the overall parameters of such streamlines: the position angle of the major axis and the axial ratio are determined for the center region features described by Rohlfs and Braunsfurth (1982). The mean position angle of θ0 = -34° and the mean axis ratio q = 1.5 are well within the range obtained for hydrodynamical model computations. In addition, the results show that the 3 kpc arm and the feature II are related.

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