Kepler constraints on planets near hot Jupiters

(2) Harvard-Smithsonian Center for Astrophysics; (3) Department of Astronomy; (4) Astronomy Department; (5) Nasa Ames Research Center; (6) Astronomy Department; (7) Department of Terrestrial Magnetism Carnegie Institution for Science; (8) NASA Exoplanet Science Institute/California Institute of Technology); Alan P. Boss (7); Astrophysics; Daniel C. Fabrycky (3)

Kepler constraints on planets near hot Jupiters

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arxiv 1205.2309 v1 pith:WPE6EKXN submitted 2012-05-10 astro-ph.EP

Jason H. Steffen (1) , Darin Ragozzine (2) , Daniel C. Fabrycky (3) , Joshua A. Carter (2) , Eric B. Ford (4) , Matthew J. Holman (2) , Jason F. Rowe (5) , William F. Welsh (6)

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William J. Borucki (5) Alan P. Boss (7) David R. Ciardi (8) Samuel N. Quinn (2) ((1) Fermilab Center for Particle Astrophysics (2) Harvard-Smithsonian Center for Astrophysics (3) Department of Astronomy Astrophysics University of California (4) Astronomy Department University of Florida (5) NASA Ames Research Center (6) Astronomy Department San Diego State University (7) Department of Terrestrial Magnetism Carnegie Institution for Science (8) NASA Exoplanet Science Institute/California Institute of Technology)

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keywords companionscandidatesjupitersnearsearchkeplerplanetarytransit

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We present the results of a search for planetary companions orbiting near hot Jupiter planet candidates (Jupiter-size candidates with orbital periods near 3 days) identified in the Kepler data through its sixth quarter of science operations. Special emphasis is given to companions between the 2:1 interior and exterior mean-motion resonances. A photometric transit search excludes companions with sizes ranging from roughly 2/3 to 5 times the size of the Earth, depending upon the noise properties of the target star. A search for dynamically induced deviations from a constant period (transit timing variations or TTVs) also shows no significant signals. In contrast, comparison studies of warm Jupiters (with slightly larger orbits) and hot Neptune-size candidates do exhibit signatures of additional companions with these same tests. These differences between hot Jupiters and other planetary systems denote a distinctly different formation or dynamical history.

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Warm Sub-Saturns Orbiting Single Stars Are Spin-Orbit Aligned
astro-ph.EP 2026-07 conditional novelty 6.0 of 10

Warm sub-Saturns around single cool stars are predominantly aligned whereas hot sub-Saturns are frequently misaligned (3.2σ), a separation-dependent transition the authors attribute to high-eccentricity migration.

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