Dynamics of the stellar component of the bulge of M31

Details Dynamics of the stellar component of the bulge of M31 Dynamics of the stellar component of the bulge of M31

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...270..485m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 270, July 15, 1983, p. 485-506.

Astronomy and Astrophysics

Astrophysics

59

Andromeda Galaxy, Galactic Rotation, Spiral Galaxies, Stellar Motions, Line Spectra, Radial Velocity, Spectrum Analysis, Tables (Data), Velocity Distribution

Scientific paper

The present study of the rotation and velocity dispersion fields of the stellar component of the bulge region of M31 indicates that the Fourier quotient technique is useful in the determination of velocities and their dispersions, even on photographic spectra. An apparent symmetry is found to be present in the rotation curves in the region whose R value is less than 10 arcsec. The position of discrete dust features shown on enhanced photography correlates with small perturbations in the rotation curves. The gas and stellar components have different intrinsic rotational velocities in the bulge, suggesting only weak coupling, if any, between the two systems. No clear dynamical evidence is noted for the presence of a barlike structure in the bulge of M31.

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