Rotation in the central region of M 31

Details Rotation in the central region of M 31 Rotation in the central region of M 31

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....50..421p&link_type=abstract

Astronomy and Astrophysics, vol. 50, no. 3, Aug. 1976, p. 421-428. In French.

Astronomy and Astrophysics

Astrophysics

22

Andromeda Galaxy, Galactic Nuclei, Galactic Rotation, Metallic Stars, Radial Distribution, Absorption Spectra, Astrodynamics, Galactic Bulge, Radial Velocity, Tables (Data)

Scientific paper

Radial velocities of stars along the major axis, minor axis and position angles 45 and 68 deg in the nuclear bulge of M 31 have been measured. Absorption lines of forbidden Ca I 4227 A, forbidden Fe I 4271 A, 4325 A, 4384 A are observed. Radial velocities of gas along the north-east major axis have been measured. Except for the major axis, the comparison of stellar and gas velocities is done using the Rubin and Ford measures. At all points the stellar velocities and the gas velocities are different. For the gas the rotation is not axially symmetric. The stellar component has symmetric motions. Evidence for difference of rotation between the stellar component of a 'super metal rich' core and the adjacent bulge of M 31 is presented.

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