Posting images of galaxies in Halton Arp's Atlas of Peculiar Galaxies (1966).
Automated account. Image curation, descriptions, typos, and most alt text by human astronomer @KellyLepo.
See posts for image credits and links to the original sources.
Gran Telescopio Canarias image of Arp 189, also known as NGC 4651.
The Tadpole is a result of a recent galactic interaction. A small intruder galaxy distorted the larger galaxy's shape, creating a 280,000 light-year-long tail, dotted with clusters of massive, young stars.
Credit: GTC, IAC, D. López
Source: https://www.gtc.iac.es/multimedia/imageGallery.php
Kitt Peak image of Arp 94, also known as NGC 3226 and NGC 3227.
The large spiral galaxy, NGC 3227 is interacting with its elliptical galaxy companion, NGC 3226. Faint tidal streams of gas and dust link the pair, showing evidence of their mutual gravitational tugs.
Credit: KPNO,NOIRLab,NSF/AURA/Sid Leach and Wil Milan/Adam Block
Source: https://noirlab.edu/public/images/noao-n3227leach/
Image of Arp 7, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Spiral galaxies - Split arms. It is a barred spiral galaxy in the constellation Hydra.
Image of Arp 5, also known as NGC 3664, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Spiral galaxies - Low surface brightness. Similar to the Large Magellanic Cloud, NGC 3664 is a barred Magellanic spiral galaxy, with a long, single spiral arm and prominent bar. It is interacting with a small dwarf galaxy, out of frame.
Image of Arp 30, also known as NGC 6365, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Spiral galaxies - One heavy arm. However, later higher-resolution images show this is actually a pair of interacting galaxies, with one galaxy viewed face-on and one viewed nearly edge-on, not one galaxy with a particularly beefy arm.
Kitt Peak National Observatory image of Arp 336, also known as NGC 2685.
It was taken with the 4-meter Mayall telescope in 1975. We can clearly see NGC 2685's ring of gas, stars, and dust that orbits perpendicular to the plane of the galaxy.
Credit: NOIRLab, NSF, AURA
Source: https://noirlab.edu/public/images/noao-02337/
Image of Arp 298, also known as NGC 7469 and IC 5283, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Double and multiple galaxies - Unclassified objects. NGC 7469, the face-on spiral galaxy, and its companion galaxy IC 5283, form an interacting pair.
IC 5283 shows signs of gravitational perturbations caused by its companion, including a tidal tail.
Hubble image of Arp 87, also known as NGC 3808 and NGC 3808A.
NGC 3808 (right) is a nearly face-on spiral galaxy with a bright ring of star formation and two spiral arms. It is interacting with its companion NGC 3808A (left). NGC 3808A is seen edge-on and is surrounded by a ring of stars and gas perpendicular to the plane of its disk, making it a polar ring galaxy.
Credit: NASA, ESA, and the Hubble Heritage Team
Source: https://science.nasa.gov/asset/hubble/interacting-galaxy-pair-arp-87/
JWST MIRI image of Arp 142, also known as NGC 2936 and NGC 2937, or the Penguin and the Egg.
At left, the Egg appears as a small teal oval with gauzy layers, showing the oldest stars in the elliptical galaxy, which has lost or used up most of its gas and dust. At right, the Penguin’s shows gas and dust that has been distorted and stretched, as well as soot-like dust in blue.
Credit: NASA, ESA, CSA, STScI
Source: https://webbtelescope.org/contents/media/images/2024/124/01J06ZFCB5NFP1H75W7Q7PMF79
Hubble image of Arp 200, also known as NGC 1134.
NGC 1134 is likely interacting with its small companion, seen to the lower right, producing streamers of stars that trail off to the right.
Credit: NASA, ESA, STScI, Julianne Dalcanton, Meli thev, Wikimedia Commons
Source: https://commons.wikimedia.org/wiki/File:NGC_1134_Hubble_F606W.jpg
