BVRI Surface Photometry of (S+S) Binary Galaxies. I. The data

Details BVRI Surface Photometry of (S+S) Binary Galaxies. I. The data BVRI Surface Photometry of (S+S) Binary Galaxies. I. The data

2001-09-15

arxiv.org/abs/astro-ph/0109231v1

Astronomy and Astrophysics

Astrophysics

23 pages. 5 Figures. Accepted for publication in Astronomy and Astrophysics. Mosaics for all pairs can be found at http://ww

Scientific paper

10.1051/0004-6361:20011275

We present multicolour broad band ($BVRI$) photometry for a sample of 33 spiral-spiral (S+S) binary galaxies drawn from the Karachentsev Catalogue of Isolated Pairs of Galaxies (KPG). The data is part of a joint observational programme devoted to systematic photometric study of one of the most complete and homogeneous pair samples available in the literature. We present azimuthally averaged colour and surface brightness profiles, colour index (B-I) maps, B band and sharp/filtered B band images as well as integrated magnitudes, magnitudes at different circular apertures and integrated colours for each pair. Internal and external data comparisons show consistency within the estimated errors. Two thirds of the sample have total aperture parameters homogeneously derived for the first time. After reevaluating morphology for all the pairs, we find a change in Hubble type for 24 galaxies compared to the original POSS classifications. More than half of our pairs show morphological concordance which could explain, in part, the strong correlation in the (B-V) colour indices (Holmberg Effect) between pair components. We find a tendency for barred galaxies to show grand design morphologies and flat colour profiles. The measurements will be used in a series of forthcoming papers where we try to identify and isolate the main structural and photometric properties of disk galaxies at different stages of interaction.

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