Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26as...79..291f&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 79, no. 2, Aug. 1989, p. 291-312.
Astronomy and Astrophysics
Astronomy
36
Astronomical Photometry, Elliptical Galaxies, Galactic Structure, Isophotes, Astronomical Catalogs, Galactic Evolution, Luminosity, Sky Surveys (Astronomy), Spiral Galaxies
Scientific paper
Luminosity, ellipticity, and position angle profiles of 43 elliptical galaxies selected from the UGC catalog are used to study isophotal twisting not arising from the intrinsic structure of the object. Isolated galaxies have been chosen to avoid distortions of the isophotes due to the occurrence of tidal effects of photometric overlapping with close companions. It is demonstrated that isophotal twisting occurs in isolated galaxies with about the same frequency as for objects in randomly selected samples. Objects having luminosity profiles close to the exp 1/4 law show no twist of the isophotes within the errors, whereas any degree of twist is allowed when more complex luminosity profiles are observed.
Bonoli Carlotta
Fasano Giancarmine
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