Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dda....39.1509f&link_type=abstract
American Astronomical Society, DDA meeting #39, #15.09
Astronomy and Astrophysics
Astronomy
Scientific paper
The atmospheres of close-in extrasolar planets absorb most of the incident stellar radiation, advect this energy, then reradiate photons in preferential directions. Those photons carry away momentum, applying a force on the planet. Here the resulting secular changes to the orbit, known as the Yarkovsky effect, are evaluated. For known transiting planets, typical fractional changes in semi-major axis are about 1% over their lifetime, but could be up to 5% for close-in planets such as OGLE-TR-56b or inflated planets such as TrES-4. Radiative thrusters are too weak by about a factor of 10 to explain the correlation between planetary semi-major axis and mass, a puzzling observational result of transit surveys which needs a dynamical explanation. However, the orbital expansion due to the Yarkovsky effect can cause interior planets to sweep exterior planets into mean motion resonance, or maintain such resonances despite the destructive influence of tidal dissipation in the planet.
No associations
LandOfFree
Radiative Thrusters on Close-in Extrasolar Planets 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 Radiative Thrusters on Close-in Extrasolar Planets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiative Thrusters on Close-in Extrasolar Planets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1538422