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SUMMARY:Eddington Lecture: Galaxies Viewed as Collections of Individual St
 ars - Julianne Dalcanton\, University of Washington
DTSTART:20120308T163000Z
DTEND:20120308T173000Z
UID:TALK34988@talks.cam.ac.uk
CONTACT:George Becker
DESCRIPTION:In extragalactic astronomy\, we routinely observe galaxies in 
 broad-band filters\, and then interpret the resulting spectral energy dist
 ribution to learn about the galaxies' masses\, star formation rates\, ages
 \, and metallicities. The fidelity of this interpretation relies on having
  a detailed understanding of the stellar populations within the galaxy\, a
 nd on accurately characterizing the luminosities and colors of the billion
 s of stars which contribute to a galaxy's light. In this talk I will discu
 ss several large programs which use the Hubble Space Telescope to resolve 
 millions of the most luminous stars in nearby galaxies. I will highlight r
 esults using near infrared observations\, focusing on  implications for th
 e evolution of stars and the integrated NIR light of distant galaxies.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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