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For refcode 1998AJ....116.2728S:
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Copyright by American Astronomical Society. Reproduced by permission
1998AJ....116.2728S THE UNIVERSALITY OF THE FUNDAMENTAL PLANE OF E AND S0 GALAXIES: SAMPLE DEFINITION AND I-BAND PHOTOMETRIC DATA MARCO SCODEGGIO, RICCARDO GIOVANELLI, AND MARTHA P. HAYNES Center for Radiophysics and Space Research and National Astronomy and Ionosphere Center,3 Cornell University, 318 Space Sciences Building, Ithaca, NY 14853; mscodegg@eso.org, riccardo@astrosun.tn.cornell.edu, haynes@astrosun.tn.cornell.edu Received 1998 May 28; revised 1998 August 31 ABSTRACT As part of a project to compare the fundamental plane and Tully-Fisher distance scales, we present here I-band CCD photometry for 636 early-type galaxies in eight clusters and groups of galaxies. These are the A262, A1367, Coma (A1656), A2634, Cancer and Pegasus Clusters, and the NGC 383 and NGC 507 Groups. Sample selection, cluster properties, and cluster membership assignment criteria are discussed. We present photometric parameters that are used in the fundamental plane relation, the effective radius r_e_, and the effective surface brightness {mu}_e_, as derived from a r^1/4^ fit to the observed radial photometric profile of each galaxy. A comparison with similar data found in the literature for the Coma Cluster shows that large systematic uncertainties can be introduced in the measurement of r_e_ and {mu}_e_ by the particular method used to derive those parameters. However, the particular combination of these two parameters that enters in the fundamental plane relation is a quantity that can be measured with high accuracy. Key words: distance scale-galaxies: distances and redshifts -galaxies: elliptical and lenticular, cD-galaxies: fundamental parameters-galaxies: photometry
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