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It Isn’t Gatorade Quenching This Galaxy

1 Sep 2020, 16:00 UTC
It Isn’t Gatorade Quenching This Galaxy
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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: Stellar and Molecular Gas Rotation in a Recently Quenched Massive Galaxy at z ∼ 0.7
Authors: Qiana Hunt et al.
First Author’s Institution: Princeton University
Status: Published in ApJL
We know that as they age, galaxies transition from blue, star-forming disks to red, quiescent ellipticals, but the stages of evolution and the process of stopping star formation (often called quenching) are still mysterious. One clue to answering these questions may be post-starburst galaxies, or galaxies that recently experienced a period of intense star formation and are now calm and quiet. The authors of today’s paper explore the properties of the stars and gas in a post-starburst galaxy to explain what mechanisms may have stopped the star formation.
The Starting Line-Up
Post-starburst galaxies are generally full of A-type stars. This means their period of star formation must have stopped a few billion years ago, within the lifetime of main sequence A-type stars. ...

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