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SUMMARY:Clean results and grubby details of exoplanet observation with lon
 g-baseline interferometry  - Mathias Nowak 
DTSTART:20191022T150000Z
DTEND:20191022T160000Z
UID:TALK131791@talks.cam.ac.uk
CONTACT:Richard Booth
DESCRIPTION:With the recent direct detection of the giant planet HR 8799 e
  by VLTI/GRAVITY\, optical interferometry has become a new arrow in the qu
 iver of exoplanet observers. By taking advantage of the angular-resolution
  offered by 100+ meter baselines\, optical interferometers can separate a 
 dim exoplanet from the overwhelming residual starlight\, leading to accura
 te measurements of the astrometric position (up to 10 uas) and high signal
 -to-noise spectroscopic data.\n\nStarting from the basic physics of long-b
 aseline interferometry\, I will go through a detailed description of VLTI/
 GRAVITY and its peculiar "dual-field" mode\, in order to explain how exopl
 anets can be observed with this instrument. Beware: there will be some equ
 ations and a lot of technical details. But if you want to know how dual-fi
 eld long-baseline interferometry actually works\, here is your chance!\n\n
 And if you can bear with this rather technical part\, then I will show the
  results obtained on the second target we observed\, beta Pictoris b\, and
  discuss what we can learn about this object from the new GRAVITY K-band s
 pectrum
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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