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Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star
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(2009) Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star. Astronomy & Astrophysics, Vol.501 (No.2). pp. 785-792. doi:10.1051/0004-6361/200911749
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Official URL: http://dx.doi.org/10.1051/0004-6361/200911749
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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Double stars -- Motion in line of sight, Eclipsing binaries, Astronomical spectroscopy, Planets -- Spectra, Planets -- Orbits | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | July 2009 | ||||
| Dates: |
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| Volume: | Vol.501 | ||||
| Number: | No.2 | ||||
| Page Range: | pp. 785-792 | ||||
| DOI: | 10.1051/0004-6361/200911749 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | HARPS consortium |
Data sourced from Thomson Reuters' Web of Knowledge
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