Isophotal shapes of early-type galaxies. I - Elongated ellipticals

Details Isophotal shapes of early-type galaxies. I - Elongated ellipticals Isophotal shapes of early-type galaxies. I - Elongated ellipticals

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...88..559n&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 88, no. 3, June 1991, p. 559-613.

Astronomy and Astrophysics

Astronomy

27

Astronomical Photometry, Elliptical Galaxies, Galactic Structure, Isophotes, Spectrophotometry, Charge Coupled Devices, Seeing (Astronomy)

Scientific paper

Forty-three very elongated elliptical galaxies were observed in direct B, V, R CCD imaging with the 2-m telescope of Pic-du-Midi Observatory and with the Canada-France-Hawaii telescope in fairly good seeing conditions. Five galaxies do not show an elliptical structure: three clearly show spiral features and one is a dumbbell. The 38 other galaxies were analyzed with an isophote-fitting procedure which allows one to derive the deviations from pure ellipses in terms of the coefficients of a Fourier series. The geometrical parameters of these 38 elongated ellipticals are presented, with brief comments on their peculiarities.

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