Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...197...69b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 197, no. 1-2, May 1988, p. 69-74.
Astronomy and Astrophysics
Astrophysics
10
Astronomical Photometry, Barred Galaxies, Circular Orbits, Galactic Nuclei, Gas Dynamics, Stellar Motions, Charge Coupled Devices, Galactic Structure, H I Regions, Velocity Distribution
Scientific paper
The stellar kinematics and the photometric properties of the SB0 galaxy NGC 2983 have been investigated. The system possesses an extended lens of constant surface brightness, crossed by a thin bar and by an outline of spiral arms. The bar contributes about 17% of the total light. The total absolute magnitude of the galaxy is estimated to be MB = -20.56. Out of the bar, the stars appear to move in circular orbits. Within the lens the velocities are slowly decreasing outward. Inside the bar, the stars deviate from circular rotation, exhibiting a wavy profile similar to that observed in other SB0s with deviations of the order of 100 km s-1. The velocity dispersion is largest at the position of the nucleus of the galaxy and roughly symmetric with respect to it. The Vmax/σo observed is 1.0 - 1.2, typical of this class of galaxies.
Bettoni Daniela
Galletta Giuseppe
Vallenari Antonella
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