Galaxies for Fun Astronomical CCD photos on peculiar galaxies and other astronomical stuff.
Here I collect some peculiar galaxies from the Arp catalogue.
NGC 772, also Arp 78, has a very prominent single arm. Interestingly Halton Arp classified the object with the description "Spiral Galaxy with small, high surface-brightness companion on arm". The bright elliptical feature below the galaxy, is in fact a satellite galaxy, NGC 770, which is one of the satellites gravitationally connected to the main galaxy. NGC 770 is suggested to be responsible for the apparent bright single arm.
Here the galaxy is represented in logarithmic scaling. The inner structure and the core is nicely presented. Note the very faint outer arm that revolves almost around the whole galaxy
A beautiful pair of galaxies in the constellation Andromeda, UGC1810 and UGC1813 at about 300 million light years away. The smaller galaxy has probably passed through the larger one. The magnitude is about 13.7
Arp 319 is the upper right double galaxy NGC 7318 in Stephan's qunitet, also known as Hickson 92.
The classification is "Large High Surface Brightness companion on arm". Arp 86 consists of NGC 7752 and NGC 7753, and is found in Pegasus. It is similar to the well known Messier 51.
www.galaxies.se - Ivar Hamberg - Updated 2019, February 23