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SUMMARY:Stellar activity mitigation in radial velocity measurements - Flor
 ian Lienhard (ETH Zurich)
DTSTART:20240430T120000Z
DTEND:20240430T130000Z
UID:TALK213649@talks.cam.ac.uk
CONTACT:Dr Dolev Bashi
DESCRIPTION:Over the past decades\, the radial velocity (RV) community has
  made tremendous leaps forward in detecting and characterising ever smalle
 r and lighter exoplanets. This trend has been interrupted in recent years\
 , as planetary RV signals below 1 m/s are drowned out by the stars’ acti
 vity. The detection of Earth analogues producing an RV effect of about 10 
 cm/s is therefore currently out of reach. Several avenues are being explor
 ed to restore the trend towards the detection of increasingly less massive
  planets. These include improvements in (1) instruments\, (2) observing st
 rategies\, (3) RV extraction techniques\, (4) stellar activity monitoring\
 , and (5) stellar activity modelling. In this talk\, I will focus on point
 s (4)\, and (5). I will provide an overview of stellar activity mitigation
  techniques and show how a proxy for stellar magnetic activity induced RV 
 variations can be extracted from intensity spectra in the visible waveleng
 th range\, providing an independent estimate of the evolution of the magne
 tic field.
LOCATION:Battcock coffee area + ONLINE - Details to be sent by email
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