I've been continuing some of my photography work on some of the Arp galaxies. Halton Arp compiled his atlas of peculiar galaxies in 1966, primarily because at the time we understood so little about how galaxies change over tiem. The atlas was intended to provide images that would give astronomers data from which they could study the evolution of galaxies. Arp arranged his atlas of peculiar galaxies in a systematic order.
SPIRAL GALAXIES
Arp 1-6 are low surface brightness galaxies. Click here to see an example.
Arp 7-12 are galaxies with split arms. Click here to see an example.
Arp 13-18 are galaxies with detached segments. Click here to see an example.
Arp 19-21 are three-armed spiral galaxies. I have not yet photographed an example of this category.
Arp 22-24 are one-armed spiral galaxies. I have not photographed any examples of these galaxies.
Arp 25-30 are spiral galaxies with one heavy arm. Click here to see an example.
Arp 31-36 are integral sign spiral galaxies. These are galaxies that look like astretched-out S shape, or like the integral sign used in calculus. Click here to see an example. I am not satisfied with any of the examples I have in this category, and plan to take better images soon.
Arp 37-48 are spiral galaxies with low surface brightness companions. Click here to see an example.
Apr 49-78 are spiral galaxies with small high surface brightness compainions. Click here to see an example.
Arp 79-91 are spiral galaxies with large high surface brightness companions. Click here to see an example.
Arp 92-101 are spiral galaxies with elliptical companions. Click here to see an example.
ELLIPTICAL AND ELLIPTICAL-LIKE GALAXIES
Arp 102-108 are elliptical galaxies connected to spiral galaxies. I have no image of this category -- yet.
Arp 109-112 are ellipitcal galaxies repelling sprial arms. Click here to see an example.
Arp 113-132 are elliptical galaxies close to and perturbing spiral galaxies. Click here to see an example.
Arp 137-145 are galaxies in which material appears to be emanating from the ellipitcal galaxy. Click here to see an example.
AMORPHOUS GALAXIES -- these are not spiral or elliptical.
Arp 146-148 are galaxies with associate rings. I am lacking an image from this category.
Arp 149-152 are galaxies with jets (material is being ejected outward from their nuclei) Click here to see an example.
Arp 153-160 are disturbed galaxies with interior absorption (hmmm, a peculiar galaxy that is disturbed?) Click here to see an example.
Arp 161-166 are galaxies with diffuse filaments. Click here to see an example. This is a poor example and I need to make better images of this category.
Arp 167-172 are galaxies with diffuse counter-tails. Click here to see an example.
Arp 173-178 are galaxies with narrow counter-tails. I have no example of this.
Arp 179-193 are galaxies with narrow filaments. Click here to see an example.
Arp 194-208 are galaxies with material ejected from nuclei. Click here to see an example.
Arp 209-214 are galaxies with irregularities, absorption and resolution. Click here to see an example.
Arp 215-220 are galaxies with adjacent loops. Click here to see an example. This is another category that I need to revisit, as this image is not very good.
Arp 221-226 are galaxies with amorphous spiral arms. Click here to see an example.
Arp 227-232 are galaxies with concentric rings. Click here to see an example. This is another category I want to revisit in order to take better images.
Arp 233-256 are galaxies with the appearance of fission. Click here to see an example.
Arp 257-268 are galaxies with irregular clumps. Click here to see an example.
DOUBLE AND MULTIPLE GALAXIES
Arp 269-274 are galaxies with connected arms. Click here to see an example.
Arp 275-280 are interacting galaxies. Click here to see an example.
Arp 281-286 are galaxies with infall and attraction. Click here to see an example.
Arp 287-293 are galaxies that appear to have "wind effects." Click here to see an example. I have two, very poor images of these galaxies -- I need to do more work here.
Arp 294-297 are double or multiple galaxies with long filaments. Click here to see an example.
UNCLASSIFIED
Arp 298-310 -- Arp did not give a subclassification to these objects. They are mostly interacting pairs. Click here to see an example.
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