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SUMMARY:Asteroseismology: A New Keplerian Revolution - Prof. Don Kurtz (UC
 LAN)
DTSTART:20141110T160000Z
DTEND:20141110T170000Z
UID:TALK52842@talks.cam.ac.uk
CONTACT:Adrian Barker
DESCRIPTION:In 1926 in the opening paragraph of his now-classic book\, The
  Internal Constitution of the Stars\, Sir Arthur Eddington lamented\, “W
 hat appliance can pierce through the outer layers of a star and test the c
 onditions within?” While he considered theory to be the proper answer to
  that question\, there is now an observational answer: asteroseismology. W
 e are in a time of a significant advance in our understanding of stellar a
 strophysics with data from the Kepler Mission. From its rich 4-year data s
 et nearly 4000 exoplanet candidates have been discovered - the majority of
  all known. Kepler has also improved our ability to see pulsations and var
 iability in stars by 100 to 1000 times compared with ground-based telescop
 es\, allowing us to probe stars using asteroseismology. We are seeing as n
 ever before: heartbeat stars\, novel eclipsing stars\, spots\, flares and 
 magnetic cycles as in our own Sun. Astrophysics that used to be theoretica
 l is now also observational: internal stellar rotation from core to surfac
 e\; gravitational lensing in eclipsing binary stars\; Doppler boosting\; m
 ultiple pulsation axes\; period doubling\; tidal excitation in highly ecce
 ntric binary stars. Kepler data for solar-like stars are now comparable to
  data for the Sun seen as a star\, giving us masses\, radii and ages for h
 undreds of single stars\, allowing determination of their orbiting planets
 ’ sizes\, and giving new constraints on stellar evolution theory. It is 
 now even possible to see into the cores of red giants and observe which st
 ars are hydrogen shell-burning and which also are helium-core burning. Thi
 s talk will introduce the concepts of asteroseismology and show a selectio
 n of exciting observational results from the Kepler mission.
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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