Twisting of the isophotes in elliptical galaxies is found to be present in about 7.5% of the systems for which photometric data are available in the literature. It is found that a reverse correlation exists between the maximum apparent flattening and the greatest observed twisting in the isophotes of 54 elliptical galaxies. From a discussion of the data, it is suggested that this correlation can provide useful information on the spatial structure of these galaxies. Some geometrical interpretations are explored.
A correlation between isophotal twisting and flattening in elliptical galaxies
GALLETTA, GIUSEPPE
1980
Abstract
Twisting of the isophotes in elliptical galaxies is found to be present in about 7.5% of the systems for which photometric data are available in the literature. It is found that a reverse correlation exists between the maximum apparent flattening and the greatest observed twisting in the isophotes of 54 elliptical galaxies. From a discussion of the data, it is suggested that this correlation can provide useful information on the spatial structure of these galaxies. Some geometrical interpretations are explored.
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