Arp 256 was spotted some 52 years ago by Halton Arp and is one of the 338 nearby weirdly-shaped galaxies indexed in the catalog "Atlas of Peculiar Galaxies
." It was created to understand the different stages of galactic evolution in the universe and includes a number of dwarf, active, as well as interacting galaxies.
Photos such as this belong to the Atlas of Peculiar Galaxies
which currently catalogues 338 galaxies.
Like many of these galaxies, the "Bear Paw" has an Arp Atlas of Peculiar Galaxies
designation, Arp 6, due to its unusual shape.
This pair of galaxies is named after the American astronomer Halton Arp, the creator of the "Atlas of Peculiar Galaxies
", a catalogue of weirdly-shaped galaxies that was originally published in 1966.
Halton Arp's Atlas of Peculiar Galaxies
, published in 1966, listed 377 members, many of which were closely interacting pairs of galaxies.
Arp is known for his 1966 catalogue, Atlas of Peculiar Galaxies
, which lists 338 examples of interacting and merging galaxies.
The rest are known as peculiar galaxies
, some of which are thought to be the result of gravitational interactions with other passing galaxies.
"The issue is whether quasars are peculiar objects that can only exist in peculiar galaxies
or whether they also exist in normal galaxies like the Milky Way," McMahon says.
Many of the objects that comprise the Hickson Compact Groups are also contained in Halton Arp's Atlas of Peculiar Galaxies
(https://is.gd/ArpCatalog) and exhibit the properties that make those objects so very compelling in the eyepiece.
The Arp 269 system features in "Arp's Catalog of Peculiar Galaxies
" - a (http://arpgalaxy.com/) list of 338 galaxies and their images based on the "Atlas of Peculiar Galaxies
," which was compiled in 1966 by astronomer Halton C.
NGC 1808 is also known as Bennett 31 and Dunlop 549 and is included in the Arp and Madore's Catalogue of Southern Peculiar Galaxies
"Six billion years ago, there were many more peculiar galaxies
than now - a very surprising result," said Rodney Delgado-Serrano, lead author of the related paper recently published in Astronomy and Astrophysics.