The analysis of triaxial, coaxial ellipsoids with different intrinsic axial ratios initiated in a previous paper is extended here, introducing an intrinsic distribution of light for each shell. The general properties of this model are studied, considering the analytical solutions for the projection along a line-of-sight in three theoretical cases: (1) dust-free systems; (2) dusty systems; and (3) luminous gaseous shells. The first case is then extended in order to predict some observable consequences. The observed properties of both an exponential and a power-law luminosity profile are compared with those of triaxial and axisymmetric systems. In addition, the variation of the central surface brightness and of the isophotal flattening at a fixed level with respect to the inclination of the Galaxy are analyzed.
Observable properties of non-axisymmetric galaxies. II - Photometric parameters
GALLETTA, GIUSEPPE
1984
Abstract
The analysis of triaxial, coaxial ellipsoids with different intrinsic axial ratios initiated in a previous paper is extended here, introducing an intrinsic distribution of light for each shell. The general properties of this model are studied, considering the analytical solutions for the projection along a line-of-sight in three theoretical cases: (1) dust-free systems; (2) dusty systems; and (3) luminous gaseous shells. The first case is then extended in order to predict some observable consequences. The observed properties of both an exponential and a power-law luminosity profile are compared with those of triaxial and axisymmetric systems. In addition, the variation of the central surface brightness and of the isophotal flattening at a fixed level with respect to the inclination of the Galaxy are analyzed.
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