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Event Number 2574

  Thursday, February 2nd, 2012

Astronomy Colloquium
A (Re) Introduction to the Milky Way (AAS Reprise)
Time: 3:30 pm
Place: 4421 Sterling Hall
Speaker: Bob Benjamin, UW Whitewater
Abstract: If your picture of the Milky Way is that it consists of a bulge, disk, and halo, you might want to attend this talk. I will review the many recent advances in understanding the global structure of our Galaxy, with a principal emphasis on the disk and inner galaxy. Radio parallaxes to maser sources, extinction distances to dark clouds, and large-scale near and mid-infrared mapping of red clump giants now allow us to map out different components (star formation, gas, and old stars) of the Galaxy without the serious issues that plagued earlier efforts. I will review some of the recent discoveries and directions for future work as I did at a plenary session at the American Astronomical Society meeting in Austin this January. After 60 years of effort, I'd say we're about 50% done mapping the Milky Way.

But as a special only-in-Wisconsin add-on, I will also show an interesting (and in retrospect, totally predictable) discovery I made while preparing for this talk, as well as showing some evidence that indicates the resurgence in Galactic structure may yet hit some rocky roads ahead.
Host: Astronomy Dept
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