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|Total magnitude, radius, colour indices, colour gradients and photometric type of galaxies|
We present a catalogue of aperture photometry of galaxies, in UBVRI,assembled from three different origins: (i) an update of the catalogueof Buta et al. (1995) (ii) published photometric profiles and (iii)aperture photometry performed on CCD images. We explored different setsof growth curves to fit these data: (i) The Sersic law, (ii) The net ofgrowth curves used for the preparation of the RC3 and (iii) A linearinterpolation between the de Vaucouleurs (r(1/4) ) and exponential laws.Finally we adopted the latter solution. Fitting these growth curves, wederive (1) the total magnitude, (2) the effective radius, (3) the colourindices and (4) gradients and (5) the photometric type of 5169 galaxies.The photometric type is defined to statistically match the revisedmorphologic type and parametrizes the shape of the growth curve. It iscoded from -9, for very concentrated galaxies, to +10, for diffusegalaxies. Based in part on observations collected at the Haute-ProvenceObservatory.
|Southern extension of the Perseus Supercluster?|
In order to investigate in 3D the galaxian density enhancement locatedin the south of the Pisces Perseus Supercluster, a redshift survey isconducted of early-type galaxies with a diameter greater than 1 arcminin a region bounded by 20 h and 6 h, and -20 and 0 deg. Data presentedinclude those for 157 radial velocities which, added to all thepreviously known redshifts in this region, show a galaxy distributionconcentrated around 5000 km/s and the presence of a void of about 25/hMpc. These two characteristics are the same as the ones found by Haynesand Giovanelli (1989), in the northern part of the Pisces PerseusSupercluster, suggesting that it could extend toward the south. Acomparison with the recent data obtained in the same region byPellegrini et al. (1990) is presented.
|Mass-to-Light Ratios of Binary Galaxies. III. Analysis|
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987ApJS...64..427S&db_key=AST
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