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A Windy Day in the Milky Way

15 Sep 2020, 16:00 UTC
A Windy Day in the Milky Way
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Editor’s note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we occasionally repost astrobites content here at AAS Nova. We hope you enjoy this post from astrobites; the original can be viewed at astrobites.org.
Title: Winds in Star Clusters Drive Kolmogorov Turbulence
Authors: Monica Gallegos-Garcia, Blakesley Burkhart, Anna Rosen, Jill P. Naiman, and Enrico Ramirez-Ruiz
First Author’s Institution: Northwestern University
Status: Published in ApJL
Turbulence, or chaotic changes in the pressure and velocity of a fluid, is one of the great mysteries of classical physics. Much of the gas in galaxies is known to be turbulent, but the mechanisms that developed and maintain this turbulence remain areas of active research. While we still don’t know all the details of the physics behind turbulence, a lot of time and effort has gone into identifying statistics that can tell us whether gas is turbulent or not. In other words, we know what turbulence looks like even if we don’t know all the details of how it works (see this Youtube video for a great introduction to turbulence and the power spectrum, a statistic used in today’s paper). Today’s ...

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