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SUMMARY:Challenges of the Doppler technique in the presence of stellar noi
 se - Guillem Anglada (Queen Mary University of London)
DTSTART:20151027T140000Z
DTEND:20151027T150000Z
UID:TALK62001@talks.cam.ac.uk
CONTACT:Greg Willatt
DESCRIPTION:The Doppler method is still the most efficient one in detectin
 g exoplanets around nearby stars which are amenable for further characteri
 sation.  In particular\, planets as small as the Earth can in principle be
  detected in hot orbits around sun-like stars (G and K dwarfs)\, and warm 
 to temperature orbits around M-dwarfs (M < 0.5 sun) in orbital periods fro
 m a few days to tens of days.  Unfortunately\, these timescales are plague
 d with structured noise caused by stellar activity.  In addition to this\,
  one or more low mass planets can be packed in few week orbits\, further a
 dding confusion and complicating the analysis of the data.  I will review 
 the evolution of the data analysis methods to put in context the current s
 tate-of-the-art in exoplanet detection in the presence of stellar noise\, 
 and discuss some controversial recent cases.  I will briefly discuss the d
 ifferent data analysis and observational strategies being investigated to 
 address these issues.  I will finally introduce the #palereddot program (o
 bservations start 16 January 2016)\, which will obtain regularly sampled D
 oppler measurements with HARPS over 60 consecutive nights on a very nearby
  star\, combined with quasi-simultaneous multi-band photometry obtained wi
 th two telescope networks (LCOGT and Gloria/Bootes).  The program will als
 o be used as an outreach opportunity to promote astronomy and exoplanets t
 o the public.  The results and data of this study (which will be released 
 within a few months after the observations are obtained) shall be used as 
 a benchmark case for future high precision programs.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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