Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star
Michaël Gillon,Michaël Gillon,David R. Anderson,Amaury H. M. J. Triaud,Coel Hellier,Pierre F. L. Maxted,D. Pollaco,Didier Queloz,Barry Smalley,Richard G. West,D. M. Wilson,S. J. Bentley,A. Collier Cameron,B. Enoch,Leslie Hebb,Keith Horne,Jonathan Irwin,Yogesh C. Joshi,Tim Lister,Michel Mayor,Francesco Pepe,N. R. Parley,Damien Ségransan,Stéphane Udry,Peter J. Wheatley +24 more
TLDR
WASP-6b as mentioned in this paper is an inflated sub-Jupiter mass planet transiting every 3.3 days around a mildly metal-poor star of magnitude V = 11.9.Abstract:
We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every $ 3.3610060^{\rm + 0.0000022 }_ $ days a mildly metal-poor solar-type star of magnitude V = 11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass $M_{\rm p} = 0.503^_$ $M_{\rm J}$ and radius $R_{\rm p} = 1.224^_$ $R_{\rm J}$, resulting in a density $\rho_{\rm p} = 0.27 \pm 0.05$ $\rho_{\rm J}$. The mass and radius for the host star are $M_\ast = 0.88^_$ $M_\odot$ and $R_\ast = 0.870^_$ $R_\odot$. The non-zero orbital eccentricity $e = 0.054^{\rm +0.018}_$ that we measure suggests that the planet underwent a massive tidal heating ~1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis $\beta = 11^_$ deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk.read more
Citations
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Journal ArticleDOI
Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
Simon Albrecht,Joshua N. Winn,John Asher Johnson,John Asher Johnson,Andrew W. Howard,Geoffrey W. Marcy,R. Paul Butler,Pamela Arriagada,Jeffrey D. Crane,Stephen A. Shectman,Ian B. Thompson,Teruyuki Hirano,Gáspár Á. Bakos,Gáspár Á. Bakos,Joel D. Hartman +14 more
TL;DR: In this article, the Rossiter-McLaughlin effect was used to show that the obliquities of stars with close-in giant planets were initially nearly random, and that the low-obliquity that are often observed are a consequence of star-planet tidal interactions.
Journal ArticleDOI
Hot stars with hot jupiters have high obliquities
TL;DR: In this article, it was shown that stars with transiting planets for which the stellar obliquity is large are preferentially hot (Teff) > 6250 K. The observed trend could be due to differences in planet formation and migration around stars of varying mass.
Book
The Exoplanet Handbook
TL;DR: In this paper, the authors present an overview of the solar system and its evolution, including the formation and evolution of stars, asteroids, and free-floating planets, as well as their internal and external structures.
Journal ArticleDOI
Spin-orbit angle measurements for six southern transiting planets New insights into the dynamical origins of hot Jupiters
Amaury H. M. J. Triaud,A. Collier Cameron,Didier Queloz,David R. Anderson,Michaël Gillon,Leslie Hebb,Coel Hellier,B. Loeillet,Pierre F. L. Maxted,Michel Mayor,Francesco Pepe,Don Pollacco,Damien Ségransan,Barry Smalley,Stéphane Udry,Richard G. West,Peter J. Wheatley +16 more
TL;DR: The goal is to measure the degree of alignment between planetary orbits and stellar spin axes, to search for potential correlations with eccentricity or other planetary parameters and to measure long term radial velocity variability indicating the presence of other bodies in the system.
Journal ArticleDOI
THE MASS OF KOI-94d AND A RELATION FOR PLANET RADIUS, MASS, AND INCIDENT FLUX*
Lauren M. Weiss,Geoffrey W. Marcy,Jason F. Rowe,Andrew W. Howard,Howard Isaacson,Jonathan J. Fortney,Neil Miller,Brice-Olivier Demory,Debra A. Fischer,Elisabeth R. Adams,Andrea K. Dupree,Steve B. Howell,Rea Kolbl,John Asher Johnson,Elliott P. Horch,Mark E. Everett,Daniel C. Fabrycky,Sara Seager +17 more
TL;DR: In this article, the authors measured the mass of a modestly irradiated giant planet, KOI-94d, which is in a 22-day orbit and receives 2700 times as much incident flux as Jupiter, and determined that it is not inflated.
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