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.
JWST image of Arp 298, also known as NGC 7469 and IC 5283.
This image is dominated by NGC 7469, a face-on spiral galaxy. Its companion galaxy IC 5283 is partly visible in the lower left corner.
Credit: ESA, NASA, CSA, L. Armus, A. S. Evans
Source: https://esawebb.org/images/potm2212a/
Legacy Surveys image of Arp 11, also known as UGC 717.
UGC 717 is the large spiral galaxy in the lower right. The large spiral in the upper left is UGC 719.
Credit: Legacy Surveys, D. Lang, NERSC, Meli thev, Wikimedia Commons
Source: https://commons.wikimedia.org/wiki/File:Arp_11_legacy_dr10.jpg
Image of Arp 81, also known as NGC 6621 and NGC 6622, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Spiral galaxies - Large, high surface brightness companions. The galaxies NGC 6621 (bottom) and NGC 6622 (top) are about mid way through a merger. A recent encounter pulled a long tail out of NGC 6621 that wraps behind the galaxy.
Hubble image of Arp 195, also known as UGC 4653.
This image of three interacting galaxies is from the Establishing HST's Low Redshift Archive of Interacting Systems snapshot program. These programs fill in gaps in Hubble's schedule (2-3 percent of the available time) with short observations.
In this image, the luminosity is from Hubble ACS/WFC observations, and color is from DECam and SDSS.
Credit: ESA, NASA, J. Dalcanton
Source: https://esahubble.org/images/potw2130a/
JWST image of Arp 269, also known as NGC 4485 and NGC 4490.
NGC 4490 (bottom left) and NGC 4485 (top right), are a pair of interacting dwarf galaxies. At 24 million light-years away, they are close enough to resolve individual stars.
This observation provides a detailed view of the bridge of red gas and stars that connects the two galaxies.
Credit: ESA, NASA, CSA, A. Adamo, G. Bortolini, FEAST JWST team
Source: https://esawebb.org/images/potm2511a/
Gemini North image of Arp 78, also known as NGC 772.
One of NGC 772’s spiral arms is particularly prominent. This is likely due to gravitational interactions with its companion galaxy NGC 770 (out of frame). The interactions left NGC 772's bottom arm elongated and asymmetrical.
Credit: International Gemini Observatory, NOIRLab, NSF, AURA
Source: https://noirlab.edu/public/images/noirlab2209a/
Sloan Digital Sky Survey image of Arp 8, also known as NGC 497.
NGC 497 is a barred spiral galaxy about 370 million light years away in the constellation Cetus.
Credit: SDSS
Source: https://commons.wikimedia.org/wiki/File:NGC497_-_SDSS_DR14.jpg
Image of Arp 18, also known as NGC 4088, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Spiral galaxies - Detached segments. NGC 4088 is an asymmetric spiral galaxy, located about 40 million light years away.
Spitzer and Hubble image of Arp 142, also known as NGC 2936, NGC 2937, and UGC 5130, or the Penguin and the Egg.
In the "Penguin", dust and gas appear as red filaments at the longer wavelengths of infrared light seen by Spitzer. The "Egg" is nearly featureless and made of older stars. The lack of dust suggests it lost its reservoir of gas and dust needed to new stars.
Credit: NASA, ESA, STScI, AURA, JPL-Caltech
Source: https://www.spitzer.caltech.edu/image/ssc2018-05a-arp-142-the-penguin-and-the-egg
Image of Arp 283, also known as NGC 2798 and NGC 2799, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Double and multiple galaxies - Infall and attraction. The right galaxy in this interacting pair, NGC 2799, is viewed edge-on. A bridge with clumps of star formation appears to connect it to NGC 2798, at left.
