Arp | SPIRAL GALAXIES: | Examples |
1-6 | Low surface brightness | NGC 2537 |
7-12 | Split arm | NGC 2523 |
13-18 | Detached segments | NGC 4088, NGC 7314 |
19-21 | Three-armed | NGC 145 |
22-24 | One-armed | NGC 4027, NGC 4618 |
25-30 | One heavy arm | M101, NGC 6946 |
31-36 | Integral sign | NGC 4615 |
SPIRALS WITH COMPANIONS ON ARMS: | ||
37-48 | Low surface brightness companions | M77, NGC 1232 |
49-78 | Small, high surface brightness companions | M90, NGC 1097 |
79-91 | Large, high surface brightness companions | M51, NGC 5395 |
92-101 | Elliptical companions | NGC 3227, Hickson 93 |
ELLIPTICAL GALAXIES: | ||
102-108 | Connected to spirals | NGC 5218 |
109-112 | Repelling spiral arms | NGC 7805 |
113-132 | Close to & perturbing spirals | M60, NGC 2300 |
133-136 | With nearby fragments | M49, NGC 1023 |
137-145 | Material emanating from E galaxies | NGC 275, NGC 2444 |
GALAXIES: | ||
146-148 | With associated rings | IC 298 |
149-152 | With jets | M87 |
153-160 | Disturbed with Interior Absorption | NGC 5128, NGC 520 |
161-166 | With diffuse filaments | NGC 3414, NGC 750 |
167-172 | Diffuse counter-tails | NGC 2672, NGC 5718 |
173-178 | Narrow counter-tails | NGC 5613, NGC 4933 |
179-193 | Narrow filaments | NGC 4651, NGC 6217 |
194-208 | Material ejected from nucleus | NGC 3432, NGC 5544 |
209-214 | Irregularities, absorption & resolution | NGC 1569, NGC 7625 |
215-220 | Adjacent loops | NGC 2782, NGC 3310 |
221-226 | Amorphous spiral arms | NGC 2655, NGC 7727 |
227-231 | Concentric rings | NGC 474, NGC 508 |
232-256 | Appearance of Fission | NGC 4038, NGC 4676 |
257-268 | Irregular clumps | NGC 3239, NGC 4861 |
DOUBLE GALAXIES: | ||
269-274 | Connected arms | NGC 4490, NGC 3395 |
275-280 | Interacting | NGC 3769, NGC 1253 |
281-286 | Infall & attraction | NGC 4631, NGC 5566 |
287-292 | Wind effects | NGC 3981, IC 195 |
294-297 | Long filaments | NGC 3786, NGC 3690 |
311-321 | Groups of galaxies | M66, Hickson 44 |
322-332 | Chains of galaxies | Hickson 55, Hickson 56 |