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Post Info TOPIC: HXMM01
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The Rapid Assembly of an Elliptical Galaxy of 400 Billion Solar Masses at a Redshift of 2.3

A rare encounter between two gas-rich galaxies indicates a solution to the problem of how giant elliptical galaxies developed so quickly in the early universe and why they stopped producing stars soon after.
The galaxy pair was initially identified by ESAs Herschel space observatory as a single bright source, named HXMM01. Follow-up observations using both space and ground-based telescopes, including the William Herschel Telescope (WHT), showed that it is in fact two interacting galaxies, each boasting a stellar mass equal to about 100 billion Suns and a similar mass of gas.
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Blobrana


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Mega-galaxy is Missing Link in History of Cosmos

A-HerschelMergerLayout_150_150_c1.jpg

Credit: JPL-Caltech/UC Irvine/Keck Observatory/STScI/NRAO/SAO/ESA/NASA

Two hungry young galaxies that collided 11 billion years ago are rapidly forming a massive galaxy about 10 times the size of the Milky Way, according to UC Irvine-led research conducted on the W. M. Keck Observatory and other research facilities around the world. The results will be published today in the journal Nature.
Capturing the creation of this type of large, short-lived star body is extremely rare - the equivalent of discovering a missing link between winged dinosaurs and early birds, said the scientists, who relied primarily on data from Keck Observatory's NIRC2 fitted with the laser guide star adaptive optics (LGSAO) system. The new mega-galaxy, dubbed HXMM01, is the brightest, most luminous and most gas-rich submillimeter-bright galaxy merger known.
HXMM01 is fading away as fast as it forms, a victim of its own cataclysmic birth. As the two parent galaxies smashed together, they gobbled up huge amounts of hydrogen, emptying that corner of the universe of the star-making gas.
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