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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20110623T000000
DTEND;TZID=Atlantic/Canary:20110623T010000
UID:iactalks-290
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/290
CREATED:2011-06-23T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Study of the planetary system HD 46375 with CoRoT and ground-based 
 support
DESCRIPTION:Study of the planetary system HD 46375 with CoRoT and ground-ba
 sed support\nDr. Patrick Gaulme\n\nAt the end of 2008, on ideas of teams f
 rom the Observatoire de la Côte  d’Azur (OCA) and IAC, the CoR
 oT satellite observed the star HD 46375,  known to host a non-transiting S
 aturn-mass exoplanet with a 3.023 day  period. HD 46375 is the brightest s
 tar with a known close-in planet in  the CoRoT accessible field of view. A
 s such, it was targeted by the  CoRoT additional program and observed in a
  CCD normally dedicated to the  asteroseismology program, to obtain an ult
 ra-precise photometric  lightcurve and detect or place upper limits on the
  brightness of the  planet. In addition, a ground-based support was simult
 aneously performed  with the high-resolution NARVAL spectro-polarimeter to
  constrain the  stellar atmospheric and magnetic properties. In this semin
 ar, I will  present the main results, in particular the stellar constrain 
 we  obtained thanks to the detection of the oscillation mode signature and
   the plausible detection of the planetary signal, which, if confirmed  wi
 th future observations, would be the first detection of phase changes  in 
 the visible for a non-transiting planet.
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