The researchers from the Sloan Digital Sky survey have reported most detailed look at the warp of our home galax
Vanligtvis tänker man på spiral galaxer as a flat disc rotating around its centre but about 60-70% of the spiral galaxies including our home galax Milky Way have discs with a slight warp or twist.
Inte mycket var känt om varp eller vridning i vårt hem galax på grund av solsystemets position i Vintergatan
The researchers of the Sloan Digital Sky Survey (SDSS), a consortium of several research organisations dedicated to creation of most detailed 3-dimensional maps of the Universum, after carefully studying the positions and motions of stjärnor all over the Milky Way have traced out the warp. They have reported findings that the Milky Way’s disc is warped and the wrap travels around the galax en gång var 440:e miljon år.
The analysis showed that the twist or the warp is caused by the ripple or the wave travelling through the Milky Way causing individual stjärnor to move up and down. The twist or the warp is continuing gravitational ripple passing through the galax caused most likely due to interaction with the satellite galax för cirka 3 miljarder år sedan.
Interestingly, our home galax Milky Way is expected to collide with the Andromeda galaxy in about 4 billion years from now when both the galaxies will merge with each other.
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Källor:
Sloan Digital Sky Survey 2021. Pressmeddelande – Vintergatan gör vågen. Publicerad 15 januari 2021. Tillgänglig online på https://www.sdss.org/press-releases/the-milky-way-does-the-wave/
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