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Gaia Sausage

All articles tagged with #gaia sausage

space3 hours ago•4 min saved

Ancient Merger May Have Tilted the Milky Way by Over 90 Degrees

Durham University researchers using supercomputer simulations say the Milky Way was probably rotated by more than 90 degrees in a head-on collision with the Gaia Sausage dwarf galaxy about 10 billion years ago, a gradual 'disc flip' that unfolded over hundreds of millions of years and helps explain the slow rotation of halo stars observed by Gaia; future mergers like Sagittarius and the Large Magellanic Cloud are unlikely to cause as dramatic a reshaping.

via The Times of India|

#disc-flip #gaia-sausage #galactic-collision

science1 day ago•3 min saved

Milky Way Was Flipped 90 Degrees by Ancient Dwarf-Galaxy Collision

Using computer simulations, astronomers propose that a head-on collision with the Gaia Sausage dwarf galaxy about 10 billion years ago flipped the Milky Way's disc by more than 90 degrees, reshaping its bulge and halo and explaining the halo's slow rotation; the Gaia mission data helped reveal this ancient collision.

via The Guardian|

#astronomy #gaia-mission #gaia-sausage

astronomy2 years ago•2 min saved

"The Formation of the Milky Way's Bar: Insights from the Last Galactic Merger"

A new study suggests that the bar shape of the Milky Way, a barred spiral galaxy, may have been caused by a collision with another galaxy, specifically the Gaia Sausage, which occurred about 8-11 billion years ago. Computer simulations show that without this collision, there could have been a 2 billion-year delay in the formation of the bar. While the study doesn't prove a direct causal relationship, it strongly implies that the collision triggered the formation of the Milky Way's bar structure. Further research and sky surveys will help us better understand the dynamics of our galactic structure.

via Universe Today|

#astronomy #barred-spiral-galaxy #computer-simulations