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SUMMARY:Stellar spectroscopy in exoplanet research  - Annelies Mortier (Ca
 vendish)
DTSTART:20181016T150000Z
DTEND:20181016T160000Z
UID:TALK112642@talks.cam.ac.uk
CONTACT:Richard Booth
DESCRIPTION:In this talk I will take you through some of the work I've bee
 n doing over the years regarding high-resolution spectroscopy and how I us
 e it to both find and characterise exoplanets. One of the more successful 
 methods to detect or confirm exoplanets is the radial velocity (RV) method
 . I will highlight the work I've been doing as part of the HARPS-N science
  team to follow-up Kepler and K2 planet candidates and determine their bul
 k densities. Stellar activity is currently the main source of noise for Ea
 rth-like planet detection and I'll discuss several strategies that can be 
 employed to deal with this stellar noise.\n\nThe extremely precise RVs nee
 ded for planet detection are extracted from a stellar spectrum containing 
 much more information. These spectra can be used to determine the stellar 
 atmospheric parameters and elemental abundances\, and thus the stellar mas
 s and radius\, essential parameters for planet characterisation. Precise a
 nd accurate stellar knowledge allows us to investigate the link between st
 ellar parameters and the presence of a planet. I will show the effects of 
 a star's metallicity on the presence and characteristics of the planets or
 biting it. 
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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