Rotational velocities in the nuclear bulge of M31

Details Rotational velocities in the nuclear bulge of M31 Rotational velocities in the nuclear bulge of M31

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235...30r&link_type=abstract

Astrophysical Journal, Part 1, vol. 235, Jan. 1, 1980, p. 30-36. Research supported by the Research Corp.

Astronomy and Astrophysics

Astrophysics

18

Andromeda Galaxy, Elliptical Galaxies, Galactic Bulge, Galactic Nuclei, Galactic Rotation, Radial Velocity, Stellar Motions, Astronomical Models, Astronomical Photography, Astronomical Photometry, Brightness, Dynamic Models, Globular Clusters, Velocity Measurement

Scientific paper

Stellar radial velocities in the nuclear bulge of M31 have been measured, using a tilting interference filter scanner at the H and K lines of Ca II. Along the minor axis, where the measurements extend to a projected distance of 3 arc min or 600 pc from the nucleus, there is no evidence for radial velocities in excess of 20 km/s. Along the major axis the measured rotational velocities are symmetric about the nucleus and appear to rise gradually over the the inner 4 arc min or 3 core radii to a value of 85 plus or minus 16 km/s. This rotation rate appears to be sufficient to account for the observed flattening of the nuclear bulge.

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