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28 March 2024
 
  » arxiv » astro-ph/9709175

 Article overview


Morphology Transformation in Pairs of Galaxies - The Local Sample
Selma Junqueira ; Duilia F. de Mello ; Leopoldo Infante ;
Date 18 Sep 1997
Subject astro-ph
AffiliationObservatorio Nacional - Brazil), Duilia F. de Mello (Observatorio Nacional - Brazil), Leopoldo Infante (P. Universidad Catolica - Chile
AbstractWe 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.
Source arXiv, astro-ph/9709175
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