Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-03-28
Astrophys.J.658:1328-1339,2007
Astronomy and Astrophysics
Astrophysics
17 pages, 7 Figures. Published in ApJ
Scientific paper
10.1086/511521
We have made a comprehensive transit search for exoplanets down to about 2 Earth radii in the HD 209458 system, based on nearly uninterrupted broadband optical photometry obtained with the MOST (Microvariability and Oscillations of Stars) satellite, spanning 14 days in 2004 and 44 days in 2005. We have searched these data for limb-darkened transits at periods other than that of the known giant planet, from about 0.5 days to 2 weeks. Monte Carlo statistical tests of the data with synthetic transits inserted allow us to rule out additional close-in exoplanets with sizes ranging from about 0.20-0.36 RJ (Jupiter radii), or 2.2-4.0 RE (Earth radii) on orbits whose planes are near that of HD 209458b. These null results constrain theories that invoke lower mass planets in orbits similar to HD 209458b to explain its anomalously large radius, and those that predict "hot Earths" due to the inward migration of HD 209458b.
Cameron Chris
Croll Bryce
Gladman Brett
Guenther David B.
Kuschnig Rainer
No associations
LandOfFree
Looking for Giant Earths in the HD 209458 System: A Search for Transits in MOST Space-based Photometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Looking for Giant Earths in the HD 209458 System: A Search for Transits in MOST Space-based Photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Looking for Giant Earths in the HD 209458 System: A Search for Transits in MOST Space-based Photometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-271940