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Date and Time of the Query: 2019-03-23 T01:35:01 PDT
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For refcode 2002A&A...383...30I:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2002A&A...383...30I New UBVRI colour distributions in E-type galaxies I. The data T. P. Idiart, R. Michard and J. A. de Freitas Pacheco Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Depto. de Astronomia, Universidade de Sao Paulo, Av. Miguel Stefano, 4200-CEP, 04301-904 S. Paulo, SP-Brazil; e-mail: thais@iagusp.usp.br Observatoire de Paris, LERMA, 77 Av. Denfert-Rochereau, 75015 Paris, France e-mail: Raymond.Michard@obspm.fr Observatoire de la Cote d'Azur, Departement Augustin Fresnel, BP 4229, 06304 Nice Cedex 4, France; e-mail: pacheco@obs-nice.fr Received 17 September 2001/Accepted 7 November 2001 Abstract. New colour distributions have been derived from wide field UBVRI frames for 36 northern bright elliptical galaxies and a few lenticulars. The classical linear representations of colours against r were derived, with some improvements in the accuracy of the zero point colours and of the gradients. The radial range of significant measurements was enlarged both towards the galaxy center and towards the outskirts of each object. Thus, the "central colours", integrated within a radius of 3", and the "outermost colours" averaged near the {mu}_V_ = 24 surface brightness could also be obtained. Some typical deviations of colour profiles from linearity are described. Colour-colour relations of interest are presented. Very tight correlations are found between the U-V colour and the Mg_2_ line-index, measured either at the Galaxian center or at the effective radius. Key words: galaxies: elliptical and lenticulars, CD - galaxies: ISM
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