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AM 0354-423

Many interacting doubles and galaxies with interacting companions, (Category 1 and 2) show tails and loops, presumably because of the interaction. But here is a class of galaxies which shows these tails or loops where the galaxies appear to be single. This is an important category because, if the galaxies really are single, it implies internal activity is responsible. Perhaps jets that fall back, or drift, or are perturbed by other objects in the vicinity, could give rise to these observed forms. This is the reason, aside from the morphological similarity, why the present Category should be considered along with Category 7: Galaxies with Jets.

Of course there is always the possibility that what looks like a single galaxy may be something else: the central ``galaxy'' may be the product of a past merger of two galaxies with the loops and tails being the long-lived echos of the collision. Only detailed investigation in each case, however, would be capable of establishing this. If the galaxy is not obviously double and has luminous filaments which are not straight, it is put into the present Category.

On the first page the object AM 2217-245 (= NGC 7252) is the well-known ``Four Petal Daisy'' named by W.W. Morgan. Schweizer (1980) has interpreted this as due to gravitational interaction of companions; others would argue that it is a case of multiple ejection. The pages following show an object AM 0031-565 on a photograph taken with the Las Campanas 2.5m telescope. The SRC Schmidt Survey plate shows that the main galaxy has a filamentary connection (showing dust features and an interior condensation) out to the very faint nebula to the south-west.

On page 15.9, the object AM 2258-595, known as the ``Flea'', is illustrated. The stellar image on the end of the filament going south-east is reported by Hawarden and Longmore to be blue and featureless but by Arp to be a low redshift star (both private communication).

AM 2217-245 picture AM 0354-423 picture AM 1025-433 picture
AM 2133-384 picture AM 2245-665 picture AM 2332-361 picture
AM 0004-413 picture AM 0415-475 picture AM 2038-382 picture
AM 0044-243 picture AM 0058-480 picture AM 0415-390 picture
AM 0318-230 picture AM 2045-432 picture AM 2303-305 picture
AM 0558-335 picture AM 2312-591 picture AM 2240-285 picture
AM 0015-315 picture AM 0126-525 picture AM 1442-401 picture
AM 2031-440 picture AM 0031-570 picture AM 0154-441 picture
AM 0547-474 picture AM 2055-425 picture AM 0311-513 picture
AM 1312-344 picture AM 1419-263 picture AM 2058-235 picture
AM 0413-454 picture AM 2029-282 picture AM 2052-301 picture
AM 2246-490 picture AM 0541-294 picture AM 0612-373 picture
AM 0041-390 picture AM 2019-442 picture AM 2247-515 picture
AM 0748-665 picture AM 2258-595 picture

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