Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...106..214p&link_type=abstract
Astronomy and Astrophysics, vol. 106, no. 2, Feb. 1982, p. 214-220.
Astronomy and Astrophysics
Astrophysics
12
Astronomical Spectroscopy, Elliptical Galaxies, Galactic Evolution, Galactic Rotation, Galactic Structure, Spiral Galaxies, Absorption Spectra, Astronomical Models, Line Spectra, Spectral Resolution, Telescopes, Velocity Distribution
Scientific paper
Rotation curves and velocity dispersions have been obtained in three early type galaxies - M 81, NGC 4736, M 32 - using spectra taken with the 1.93 m telescope of the Observatoire de Haute Provence with resolutions of 1.2 and 2.5 Å over the spectral range from 4000 to 4500 Å. We confirm Kormendy and Illingworth's (1979) conclusion that bulges of early type spirals exhibit higher rotation velocities and smaller velocity dispersions than giant ellipticals; M 32 has a similar behaviour. No rotation appears on the minor axes of M 81 and M 32. These data and those previously obtained on M 31 are consistent with the isotropic oblate model of Binney (1978).
Pellet A.
Simien Francois
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