Enormous Multi-Galactic Pile-up

Science & Reason on Facebook: tinyurl.com Hubblecast 13: Gargantuan galaxy NGC 1132 - A cosmic fossil. The NASA/ESA Hubble Space Telescope has captured a new image of the galaxy NGC 1132 which is most likely to be a cosmic fossil - the aftermath of an enormous multi-galactic pile-up, where the carnage of collision after collision has built up a brilliant but fuzzy giant elliptical galaxy far outshining typical galaxies. --- Please subscribe to Science & Reason: • www.youtube.com • www.youtube.com • www.youtube.com • www.youtube.com --- The elliptical galaxy NGC 1132, seen in this latest image from Hubble, belongs to a category of galaxies called giant ellipticals. NGC 1132, together with the small dwarf galaxies surrounding it, are dubbed a "fossil group" as they are most likely the remains of a group of galaxies that merged together in the recent past. In visible light NGC 1132 appears as a single, isolated, giant elliptical galaxy, but this is only the tip of the iceberg. Scientists have found that NGC 1132 resides in an enormous halo of dark matter, comparable to the amount of dark matter usually found in an entire group of tens or hundreds of galaxies. It also has a strong X-ray glow from an abundant amount of hot gas -- an amount normally only found in galaxy groups. Its X-ray glow extends over a region of space ten times larger than the 120000 light-year radius it has in visible light. An X-ray glow that is equal in size to that of an entire group of galaxies. The ...



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