Static properties of galaxies in the Shapley-centaurus cluster |
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| Authors: | R J Dodd F P Andrews H T Macgillivray |
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| Institution: | (1) Carter Observatory, Wellington, New Zealand;(2) Royal Observatory, Edinburgh, Scotland, U.K. |
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| Abstract: | The data of Paper I (Doddet al., 1986), representing a catalogue of parameters measured for bright galaxies in field 444 of the Southern Sky Survey, are examined in a search for non-random effects. A global trend of bimodal alignment of galaxies in this field is found. This effect is present even for galaxies of large apparent ellipticity (e 0.5) and is interpreted as revealing a real physical phenomenon on the large scale in this field. Analysis of nearest neighbouring pairs of galaxies reveals evidence also for small-scale interactions. The difference in apparent ellipticities between close pairs is larger than would be expected if the galaxies were randomly distributed. Nearest neighbouring galaxies also show a strong preference to be aligned with their major axes parallel. The results are discussed with regard to theories for galaxy formation. |
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