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Meet the AAS Keynote Speakers: Dr. Caitlin Casey

5 Jan 2019, 21:41 UTC
Meet the AAS Keynote Speakers: Dr. Caitlin Casey
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In this series of posts, we sit down with a few of the keynote speakers of the 233nd AAS meeting to learn more about them and their research. You can see a full schedule of their talks here!

Searching for hidden galaxiesSince Galileo first pointed a telescope at the stars, most of our understanding of the universe has been driven by observations in optical (or close to optical) wavelengths. This is especially true when we study star formation. Astronomers usually measure star formation rates with tracers like ultraviolet light or optical emission lines, both of which are produced by recently-formed massive stars.Based on these tracers, we believe that ever since redshift z~2, the star formation rate of the universe has dropped. But what happened before z~2? Unfortunately, the universe becomes frustratingly difficult to probe at higher redshifts. Dust blocks much of the optical and UV light from stars, and we’re often limited to narrow “pencil-beam” surveys, making it difficult to observe anything beyond a few narrow fields of view.Prof. Caitlin Casey from the University of Texas AustinRecently, radio instruments like the Atacama Large Millimeter Array (ALMA) have begun to widen our viewpoints. “We’re trained to think in that [infrared, optical, ...

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