Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135...89c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 1, June 1984, p. 89-93. Research supported by the Consiglio Nazionale
Astronomy and Astrophysics
Astrophysics
7
Astronomical Photography, Astronomical Photometry, Elliptical Galaxies, Galactic Radiation, Brightness, Isophotes, Luminosity
Scientific paper
A study of the photometric and geometric properties of the elliptical NGC 3557, a galaxy which has been reported to have a high rotational velocity, rather exceptional for its class and reminiscent of those of S0 bulges, is presented. The morphological classification is quantitatively confirmed by showing that the luminosity profile follows closely the r to the 1/4 power law from 5 arcsec to the last observed point at mu = 27.05 B-mass. It is also found that the galaxy has a nuclear component in excess over the best fitting r to the 1/4 power law. Finally, the somewhat conflicting evidence (oblateness versus triaxiality) resulting from the analysis of the kinematical and geometrical parameters is pointed out.
Capaccioli Massimo
Held Enrico V.
Rampazzo Roberto
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