THREE WASP-SOUTH TRANSITING EXOPLANETS: WASP-74b, WASP-83b, AND WASP-89b
THREE WASP-SOUTH TRANSITING EXOPLANETS: WASP-74b, WASP-83b, AND WASP-89b
复制标题
DOI：
10.1088/0004-6256/150/1/18
复制
发表时间：
2014-10
期刊：
影响因子：
--
通讯作者：
C. Hellier;D. Anderson;A. Cameron;L. Delrez;M. Gillon;E. Jehin;M. Lendl;P. Maxted;F. Pepe;D. Pollacco;D. Queloz;D. Ségransan;B. Smalley;Alexis M. S. Smith;J. Southworth;A. Triaud;O. Turner;S. Udry;R. West
中科院分区：
文献类型：
--
作者：
C. Hellier;D. Anderson;A. Cameron;L. Delrez;M. Gillon;E. Jehin;M. Lendl;P. Maxted;F. Pepe;D. Pollacco;D. Queloz;D. Ségransan;B. Smalley;Alexis M. S. Smith;J. Southworth;A. Triaud;O. Turner;S. Udry;R. West
We report the discovery of three new transiting hot Jupiters by WASP-South together with the TRAPPIST photometer and the Euler/CORALIE spectrograph. WASP-74b orbits a star of V = 9.7, making it one of the brighter systems accessible to southern telescopes. It is a 0.95MJup planet with a moderately bloated radius of 1.5 R Jup ?> in a 2 day orbit around a slightly evolved F9 star. WASP-83b is a Saturn-mass planet at 0.3 M Jup ?> with a radius of 1.0 R Jup ?> . It is in a 5 day orbit around a fainter (V = 12.9) G8 star. WASP-89b is a 6 MJup planet in a 3 day orbit with an eccentricity of e = 0.2. It is thus similar to massive, eccentric planets such as XO-3b and HAT-P-2b, except that those planets orbit F stars whereas WASP-89 is a K star. The V = 13.1 host star is magnetically active, showing a rotation period of 20.2 days, while star spots are visible in the transits. There are indications that the planet’s orbit is aligned with the stellar spin. WASP-89 is a good target for an extensive study of transits of star spots.
