Architecture of Kepler 's Multi-transiting Systems. Ii. New Investigations With Twice as Many Candidates
Year: 2014
Type: article
Abstract: We report on the orbital architectures of Kepler systems having multiple-planet candidates identified in the analysis of data from the first six quarters of Kepler data and reported by Batalha et al. (2013). These data show 899 transiting planet candidates in 365 multiple-planet systems and provide a powerful means to study the statistical properties of planetary systems. Using a generic mass–radius relationship, we find that only two pairs of planets in these candidate systems (out of 761 pairs total) appear to be on Hill-unstable orbits, indicating ∼96% of the candidate planetary systems are correctly interpreted as true systems. We find that planet pairs show little statistical preference to be near mean-motion resonances. We identify an asymmetry in the distribution of period ratios near first-order resonances (e.g., 2:1, 3:2), with an excess of planet pairs lying wide of resonance and relatively few lying narrow of resonance. Finally, based upon the transit duration ratios of adjacent planets in each system, we find that the interior planet tends to have a smaller transit impact parameter than the exterior planet does. This finding suggests that the mode of the mutual inclinations of planetary orbital planes is in the range 1 0–2 2, for the packed systems of small planets probed by these observations.
Source: The Astrophysical Journal
Authors: Daniel C. Fabrycky, Jack J. Lissauer, Darin Ragozzine, Jason F. Rowe, Jason H. Steffen, Eric Agol, Thomas Barclay, Natalie Batalha, William Borucki, David R. Ciardi, Eric B. Ford, Thomas N. Gautier, John C. Geary, Matthew J. Holman, Jon M. Jenkins, Jie Li, Robert C. Morehead, Robert L. Morris, Avi Shporer, Jeffrey C. Smith, Martin Still, Jeffrey Van Cleve
Institutions: University of California, Santa Cruz, Ames Research Center, Center for Astrophysics Harvard & Smithsonian, Search for Extraterrestrial Intelligence, Northwestern University, Fermi National Accelerator Laboratory, University of Washington, Bay Area Environmental Research Institute, San Jose State University, California Institute of Technology, NASA Exoplanet Science Institute, Pennsylvania State University, University of Florida, Jet Propulsion Laboratory, Las Cumbres Observatory Global Telescope Network, University of California, Santa Barbara
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: CAREER: Prospecting for planets, G2171960263, Graduate Research Fellowship Program, G433322167, G4518818167, MSPA-AST: Searching for Earth-Mass Planets: Bayesian Algorithms to Analyze Transit Timing Observations, G58316358, G6273510985, "CHARACTERIZING THE ORBITAL ECCENTRICITIES OF EARTH-LIKE PLANETS WITH KEPLER" THE DISCOVERY OF OVER 200 EXTRASOLAR PLANETS WITH THE RADIAL VELOCITY T, G767601387
OpenAlex ID: W2039484433