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.
Image of Arp 287, also known as NGC 2735 and NGC 2735A, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Double and multiple galaxies - Wind effects. NGC 2735 is the large spiral in the center. It is interacting with the smaller NGC 2735A.
Image of Arp 293, also known as NGC 6285 and NGC 6286, from the Atlas of Peculiar Galaxies by Halton Arp (1966).
In the original catalog, it was in the category: Double and multiple galaxies - Wind effects. NGC 6285 (left) and NGC 6286 (right) have roughly equal masses. Their mutual gravitational attraction pulls streams of gas, stars, and dust from the galaxies as they interact.
Spitzer image of Arp 16, also known as M66.
In this infrared image of M66 from the Spitzer Infrared Nearby Galaxy Survey (SINGS), we see a stark contrast between the blue core and bar with a concentration of blue older stars, and the pink bar ends and spiral arms that show dust heated by actively forming stars.
Credit: NASA/JPL-Caltech/R. Kennicutt (University of Arizona) and the SINGS Team
Source: https://www.spitzer.caltech.edu/image/sig05-016-ngc-3627-m66
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
