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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1073
DTSTART:20080325T204500Z
DURATION:PT1H0M0S
DTSTAMP:20260409T030706Z
LAST-MODIFIED:20080311T140742Z
LOCATION:6515 Sterling Hall (coffee at 3:30 pm in 6521 Sterling)
SUMMARY:Smith's Cloud: The Most Interesting Hydrogen Cloud in the Loca
 l Universe\, Astronomy Colloquium\, Jay Lockman\, NRAO
DESCRIPTION:In the first part of the talk I will review the capabiliti
 es of the new Green Bank 100 meter diameter radio telescope (GBT) and 
 briefly discuss some of the scientific programs to which it has contri
 buted. The main part of the talk will be about Smith's Cloud. This hyd
 rogen cloud has been known since 1963 and is usually classified as a h
 igh-velocity cloud\, but only recently has its nature become clear thr
 ough observations with the GBT. It is a coherent mass of gas more than
  3x1 kpc in extent\, contains more than a million solar masses of hydr
 ogen\, and appears to be on a trajectory to cross the Galactic plane i
 n 20-40 Myr. It is now interacting with the gaseous halo of the Galaxy
  and is in the process of breaking up. It may be the prototype of a ga
 s cloud accreting onto the Milky Way and bringing fresh gas to fuel st
 ar formation.
URL:https://www.physics.wisc.edu/events/?id=1073
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