Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....42..221b&link_type=abstract
Astronomy and Astrophysics, vol. 42, no. 2, Aug. 1975, p. 221-228. Research supported by the Consiglio Nazionale delle Ricerche
Astronomy and Astrophysics
Astrophysics
6
Astronomical Photography, Astronomical Photometry, Galactic Rotation, Spiral Galaxies, Brightness, Luminosity, Radial Velocity, Spatial Distribution, Spectroscopic Analysis
Scientific paper
Surface photographic photometry of the spiral galaxy NGC 2683 in the B system is presented. Standard photometric parameters are derived. Assuming a reasonable shape for the outermost isophotes, it is shown that the equivalent luminosity profile does follow an exponential law, thus confirming that the luminosity gradients in the outer regions of spirals are different from those in ellipticals. The direction of rotation of the spiral arms is discussed, and they are found to be trailing. Moreover, spectra taken along the major axis of the galaxy suggest the presence of deviations from circular motions. From rough estimates of the mass and the mass-to-light ratio, the distance of the galaxy is discussed.
Barbon Roberto
Capaccioli Massimo
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