Journal
ASTRONOMY & ASTROPHYSICS
Volume 551, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201220900
Keywords
planetary systems; binaries: eclipsing; stars: individual: WASP-80; techniques: radial velocities; techniques: photometric; techniques: spectroscopic
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Funding
- Swiss National Science Foundation
- Belgian Fund for Scientific Research (Fond National de la Recherche Scientifique, F.R. SFNRS) [FRFC 2.5.594.09.F]
- Swiss National Science Foundation (SNF)
- National Aeronautics and Space Administration
- National Science Foundation
- STFC [ST/I001719/1, PP/F000057/1, PP/F000065/1, ST/J000027/1, PP/D000955/1, ST/J001384/1, ST/J001651/1, ST/K006126/1, ST/G002355/1, ST/J000035/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001651/1, PP/F000065/1, PP/F000057/1, ST/J001384/1, ST/K006126/1, PP/D000955/1, ST/I001719/1, ST/J000035/1, ST/J000027/1, ST/G002355/1] Funding Source: researchfish
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We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V = 11.9, K = 8.4). Our analysis shows this is a 0.55 +/- 0.04 M-jup, 0.95 +/- 0.03 R-jup gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the v sin i(star) inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening.
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