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SUMMARY:Massive stars\, a strong case for cosmic marriage - Rob Izzard (Io
 A\, Cambridge)
DTSTART:20151203T160000Z
DTEND:20151203T170000Z
UID:TALK61311@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:Massive stars are rare beasts but they contribute copious ener
 gy\, mass and momentum to the interstellar medium and thus are crucial to 
 the evolution of galaxies. They also produce many of elements that make li
 fe on Earth possible\, such as the oxygen in our atmosphere and the iron i
 n our blood. In some ways\, massive stars resemble simple\, “one-dimensi
 onal” stars. However\, recent observational discoveries have led us to r
 ethink our basic understanding of these objects. More massive stars are in
  close\, potentially interacting or interacted\, binary-star systems than 
 was previously thought. Some are very rapidly rotating and some are chemic
 ally mixed. Theory predicts that spin and mixing correlate: but sometimes 
 the opposite is seen. Binary-stars can probably explain the massive-star s
 pin distribution\, as well as their peculiar chemical abundances\, and our
  modelling efforts are just starting to bear fruit in this field. I will r
 eview the properties of massive stars before expanding on some recent high
 lights in regard to stellar spins\, the stellar mass function\, and the re
 lation between chemistry and duplicity in massive stars. Finally\, there w
 ill be an administrative announcement.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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