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Title:
Dependences between the magnitude gap of groups and the morphology of two brightest galaxies
Creator:
Mahtessian, A. P. ; Movsisyan, V. H. ; Mahtessian, L. A. ; Karapetian, G. S.
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Abstract:
In the present study, the dependencies of the morphological types of the first and second ranked group galaxies on the magnitude gap were studied. It is shown that there is no increase in the relative number of elliptical galaxies among the first and second ranked group galaxies with large magnitude gaps (in comparison with the expectation, by assuming that the morphological type of these galaxies does not depend on the magnitude gap). This result contradicts the merger hypothesis. The hypothesis proposed by Ambartsumian does not contradict this result.