Morphology Transformation in Pairs of Galaxies - The Local Sample

Details Morphology Transformation in Pairs of Galaxies - The Local Sample Morphology Transformation in Pairs of Galaxies - The Local Sample

1997-09-17

arxiv.org/abs/astro-ph/9709175v3

Astronomy and Astrophysics

Astrophysics

14 pages LaTeX file, 7 gif figures, uses epsf.sty, l-aa.sty

Scientific paper

10.1051/aas:1998174

We present photometric analysis of a local sample of 14 isolated pairs of galaxies. The photometric properties analyzed in the local pairs are: colors, morphology, tidal effects and activity. We verify that close pairs have an excess of early-type galaxies and many elliptical galaxies in this pairs are, in fact, lenticular galaxies. Many late-pairs in our sample show strong tidal damage and blue star formation regions. We conclude that pairs of different morphologies may have passed through different evolution processes which violently transformed their morphology. Pairs with at least one early-type component may be descendents of groups of galaxies. However, late-type pairs are probably long-lived showing clearly signs of interaction. Some of them could be seen as an early stage of mergers. These photometric database will be used for future comparison with more distant pairs in order to study galaxy evolution.

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