Dark energy camera captures the glittering galaxies of the Antlia Cluster

The Antlia Cluster (Abell S636) is a group of at least 230 galaxies located about 130 million light-years away in the direction of the constellation Antlia (the Air Pump). It hosts a rich variety of galaxy types, including lenticular galaxies, irregular galaxies and ultra-compact dwarfs. The cluster is dominated by two massive elliptical galaxies — NGC 3268 (center) and NGC 3258 (lower right). This image was taken with the 570-megapixel Department of Energy-fabricated Dark Energy Camera (DECam), mounted on the U.S. National Science Foundation (NSF) Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile, a Program of NSF NOIRLab. It captures only a portion of the 230 of galaxies that so far have been found to make up the Antlia Cluster. DECam’s ultra-deep view showcases the variety of galaxies within and beyond the cluster in incredible detail. Credit: Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA. Image processing: R. Colombari & M. Zamani (NSF NOIRLab)

(Dark matter in the Perseus Cluster. The distribution of dark matter (in blue) is overlayed on an image taken by Hyper Sprime-Cam on the Subaru Telescope. The newly detected subcluster located near the galaxy NGC 1264 lies about 1.4 million light-years to the west (right side of the image) of Perseus’s central galaxy, NGC 1275. A faint bridge connects the two structures. Credit: HyeongHan et al)

"An international team of astronomers has solved one of the longstanding cosmic mysteries by uncovering direct evidence of a massive, long-lost object that collided with the Perseus cluster. Using high-resolution data from the Subaru Telescope, the researchers successfully traced the remnant of this ancient merger through the dark matter distribution.

Galaxy clusters, composed of thousands of galaxies bound together by gravity, are among the most massive structures in the universe. They grow through energetic mergers—some of the most powerful events since the Big Bang."

4:23 PM EST November 6, 2024:

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