Radii, Masses, Densities, and Occurrence for Planets within 0.25 AU

Details Radii, Masses, Densities, and Occurrence for Planets within 0.25 AU Radii, Masses, Densities, and Occurrence for Planets within 0.25 AU

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p41d..01m&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P41D-01

Other

[5400] Planetary Sciences: Solid Surface Planets

Scientific paper

Planets of near Earth-size are being detected for the first time around other stars by the NASA Kepler Mission and by the 10-meter Keck telescope. We report the observed distribution of planet radii, masses, and orbital distances for short orbital periods less than 50 days around Solar-type (GK) stars. Extensive Doppler and Kepler measurements provide detectability for planets as small as 2.0 Earth radii. We use the measured photometric signal-to-noise ratio for each of the 156,000 target stars in the Kepler survey to determine planet detectability as a function of planet radius and orbital period. We consider Solar-type stars brighter than magnitude 15 that have the highest quality photometry. The resulting occurrence of planets as a function of planet radius increases strongly toward the smallest radii (2 Earth-radii): Small planets of twice Earth-size are 3x more common than Neptune-size planets and 10x more common than Jupiter-size planets. Planets are more commonly found at longer orbital periods ( up to 50 days, 0.25 AU) than close-in. This high occurrence of smaller planets supports core-accretion theory but disagrees with a simple theory of migration in a gaseous disk that predicts a desert at Super-Earth and Neptune sizes for close-in orbits, which is not seen in the data.

Affiliated with

Also associated with

No associations

Rating

Radii, Masses, Densities, and Occurrence for Planets within 0.25 AU 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 Radii, Masses, Densities, and Occurrence for Planets within 0.25 AU, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radii, Masses, Densities, and Occurrence for Planets within 0.25 AU will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-871662