Isophotal contours of early-type galaxies. I - The data

Details Isophotal contours of early-type galaxies. I - The data Isophotal contours of early-type galaxies. I - The data

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...74...25m&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 74, no. 1, July 1988, p. 25-51.

Astronomy and Astrophysics

Astrophysics

28

Astronomical Photometry, Elliptical Galaxies, Galactic Structure, Isophotes, Brightness Distribution, Fourier Analysis

Scientific paper

An isophotal shape analysis has been performed for 29 E and S0 galaxies observed in the B waveband. The galaxies considered cover a wide range of dimensions and luminosities, and they are mostly in the Virgo area. In the present method, the isophotal contour to be examined is first channel-coded by a sequence of linear fits with a set of eight standard elementary segments. The center position and major-axis orientation of the contour are then determined, along with the parameters representing the deviation from the ellipse. The resulting two-dimensional smoothed and sampled brightness distributions have application as ready-to-use data for model fitting.

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