Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...234..119m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 234, no. 1-2, Aug. 1990, p. 119-127.
Astronomy and Astrophysics
Astrophysics
9
Elliptical Galaxies, Galactic Structure, Isophotes, Astronomical Models, Brightness Distribution, Galactic Evolution, Three Dimensional Models
Scientific paper
Model calculations are presented to determine the surface-brightness distribution of triaxial model galaxies with radially varying axis ratios, where the surfaces of equal luminosity are coaxial ellipsoid shells. It is found that even moderate triaxial models (deviation from rotation symmetry less than 5 percent) produce considerably twisting isophotes if observed under oblique view. Two triaxial models, one of near-oblate and one of near-prolate shape, are investigated in detail. Isophote twisting larger than 10 deg occurs for 15 percent of all possible projections and thus occurs more frequently for the model galaxies than for observed elliptical galaxies.
Madejsky Rainer
Moellenhoff Claus
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