Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..76..477h&link_type=abstract
Astrophysics and Space Science, vol. 76, no. 2, May 1981, p. 477-490.
Astronomy and Astrophysics
Astrophysics
14
Andromeda Galaxy, Galactic Rotation, Gas Expansion, Kinematics, Data Processing, Galactic Nuclei, Galactic Structure, Radial Velocity
Scientific paper
The systemic velocity of M31, rotation and expansion velocities as functions of galactocentric distance have been derived from all data available on the radial velocity field of the Andromeda galaxy. The bending of the outer parts of the M31 disk has been considered. The calculations confirm the existence of gas outflow from the central parts of the galaxy. The obtained rotation curve is rather flat from 5 to 37 kpc. The spiral arms cause the waves both in the rotation and expansion curve. The new rotation curve is given.
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