Massive rotating disk galaxy formed 1.5 billion years after Big Bang found in universe

In a rare discovery, astromers have found a distant rotating disk galaxy ever observed, kwn as  Wolfe Disk after late astromer Arthur M. Wolfe, spinning at 170 miles (272 kilometers) per second similar to our Milky Way. In a report published on May 20, in scientific journal Nature, and  UC Santa Cruz official website, an international team of astromers found a massive rotating disk galaxy that existed when universe was only ten per cent of its current , which w challenges tritional models of galaxy formation. 

Discovered with Atacama Large Millimeter/submillimeter Array (ALMA), rotating galaxy DLA0817g w challenges many galaxy formation simulations, which predict that massive galaxies in evolution of cosmos grew through mergers of smaller galaxies and hot clumps of gas.

Its properties are astonishingly similar to our own galaxy, despite being only 1.5 billion years old,  coauthor J. Xavier Prochaska, professor of astromy and astrophysics at UC Santa Cruz said in UC’s research report.

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Ar le author, Marcel Neeleman, Max Planck Institute for Astromy in Heidelberg, Germany, was quoted saying that while previous studies hinted at existence of se early rotating gas-rich disk galaxies, thanks to ALMA astromers w have unambiguous evidence that y occur as early as 1.5 billion years after Big Bang.  

We think Wolfe Disk has grown primarily through stey accretion of cold gas, UC’s astromer Prochaska said in report. Still, one of questions that remains is how to assemble such a large gas mass while maintaining a relatively stable, rotating disk, he ded.

Star formation ten times higher

Furr, ding to Prochaska’s point, Neelam explained that most galaxies that were found early in universe looked like train wrecks because y underwent constant and often violent merging. And hence, se hot mergers make it difficult to form well-ordered, cold, rotating disks as we observe in our present universe. And that makes it a unique finding, he ded.  

As per report, team also used National Science Foundation’s Karl G. Jansky Very Large Array (VLA) and NASA/ESA Hubble Telescope to learn more about formation of stars in Wolfe Disk.  star formation rate in Wolfe Disk was at least ten times higher than in Milky Way galaxy, which proves that it must be one of most productive disk galaxies in early universe, Prochaska was quoted saying in report. 

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