Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87.1648r&link_type=abstract
Astronomical Journal, vol. 87, Dec. 1982, p. 1648-1655.
Astronomy and Astrophysics
Astronomy
7
Astronomical Photometry, Brightness Distribution, Elliptical Galaxies, Galactic Radiation, Luminosity, Angular Distribution, Astronomical Models, Azimuth, Cosmic Dust, Ellipticity, Two Dimensional Models
Scientific paper
The two-dimensional luminosity distribution of the standard elliptical galaxy NGC 3379 is mapped by numerically fitting ellipses to the isophotes and a set of two-dimensional models of this distribution are constructed. The radial dependence of large-scale features such as ellipticity and position angle are derived and compared with previously published results. The amount of small-scale structure that could be due to the presence of dust in the galaxy is quantitatively determined, and the small-amplitude, wavelike radial deviations of the luminosity from a smooth R to the 1/4th law of de Vaucouleurs (1948) is studied. The possible origins of the wavelike luminosity variations are briefly discussed. Although a tidal origin cannot be ruled out, the variations could be a signature of the equilibrium configurations of an elliptical galaxy.
Burstein David
Ratcliff Stephen J.
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