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Astronomers Find Shell Structures in Milky Way Galaxy for First Time  5nvklj





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Astronomers Find Shell Structures in Milky Way Galaxy for First Time

Dragon
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Astronomers Find Shell Structures in Milky Way Galaxy for First Time  Empty Astronomers Find Shell Structures in Milky Way Galaxy for First Time

Post by Dragon Wed Oct 21, 2020 5:22 pm

A team of astronomers from Rensselaer Polytechnic Institute, the University of Pennsylvania, Flatiron Institute, and Queen’s University has spotted two shells in the Virgo Overdensity region and two shells in the Hercules Aquila Cloud region of the Milky Way.

These structures were produced about 3 billion years ago, when a dwarf galaxy plunged into the Milky Way’s center and was ripped apart by the gravitational forces.

Continued...
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Astronomers Find Shell Structures in Milky Way Galaxy for First Time  334pu7m
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Post by Dragon Wed Oct 21, 2020 5:23 pm

Astronomers Find Shell Structures in Milky Way Galaxy for First Time  Image_8968-Milky-Way-Shells
Image credit: Rensselaer Polytechnic Institute.

Stars identified by Donlon II et al. have formed shell structures in the aftermath of a radial merger occurring 3 billion years ago

About two decades ago, astronomers identified an unusually high density of stars called the Virgo Overdensity.

Star surveys revealed that some of these stars are moving toward us while others are moving away, which is also unusual, as a cluster of stars would typically travel in concert.

Source / Image Courtesy


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Astronomers Find Shell Structures in Milky Way Galaxy for First Time  334pu7m
Dragon
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Astronomers Find Shell Structures in Milky Way Galaxy for First Time  Empty Re: Astronomers Find Shell Structures in Milky Way Galaxy for First Time

Post by Dragon Wed Oct 21, 2020 5:26 pm



This video shows an N-body simulation of a dwarf galaxy crashing through the center of the Milky Way galaxy.

This smaller galaxy is ripped apart and its stars are flung into the halo of the Milky Way, creating shell structure.

Source


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Astronomers Find Shell Structures in Milky Way Galaxy for First Time  334pu7m

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