ORBITAL ORIENTATIONS OF EXOPLANETS: HAT-P-4b IS PROGRADE AND HAT-P-14b IS RETROGRADE
ORBITAL ORIENTATIONS OF EXOPLANETS: HAT-P-4b IS PROGRADE AND HAT-P-14b IS RETROGRADE
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系外行星的轨道方向：HAT-P-4b 为顺行，HAT-P-14b 为逆行
DOI：
10.1088/0004-6256/141/2/63
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. Morton
中科院分区：
文献类型：
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作者：
J. Winn;A. Howard;J. Johnson;G. Marcy;H. Isaacson;Avi Shporer;G. Bakos;J. Hartman;M. Holman;S. Albrecht;J. Crepp;T. Morton
我们展示了对两个系外行星系统的罗西特-麦克劳克林效应的观测，揭示了它们的轨道相对于其母恒星的旋转轴的方向。HAT-P-4b是顺行的，与天空投影的自旋轨道角λ =−4.9±11.9度。相反，HAT-P-14b是逆行的，λ = 189.1±5.1度。这些结果符合先前在近距离巨行星的恒星宿主中注意到的模式：较热的恒星具有广泛的倾角，较冷的恒星具有较低的倾角。反过来，这表明三体动力学和潮汐耗散是许多系外行星短周期轨道的原因。此外，我们的数据显示，HAT-P-4系统中还有第三个天体，可能是第二颗行星或伴星。
We present observations of the Rossiter–McLaughlin effect for two exoplanetary systems, revealing the orientations of their orbits relative to the rotation axes of their parent stars. HAT-P-4b is prograde, with a sky-projected spin-orbit angle of λ = −4.9 ± 11.9 deg. In contrast, HAT-P-14b is retrograde, with λ = 189.1 ± 5.1 deg. These results conform with a previously noted pattern among the stellar hosts of close-in giant planets: hotter stars have a wide range of obliquities and cooler stars have low obliquities. This, in turn, suggests that three-body dynamics and tidal dissipation are responsible for the short-period orbits of many exoplanets. In addition, our data revealed a third body in the HAT-P-4 system, which could be a second planet or a companion star.
DOI：
10.1088/0004-637x/709/1/159
发表时间：
2009-08
期刊：
The Astrophysical Journal
影响因子：
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作者：
D. Anderson;C. Hellier;M. Gillon;M. Gillon;A. Triaud;B. Smalley;L. Hebb;A. Cameron;P. Maxted;D. Queloz;R. West;S. Bentley;B. Enoch;K. Horne;T. Lister;M. Mayor;N. Parley;F. Pepe;D. Pollacco;D. Ségransan;S. Udry;D. Wilson;D. Wilson
通讯作者：
D. Anderson;C. Hellier;M. Gillon;M. Gillon;A. Triaud;B. Smalley;L. Hebb;A. Cameron;P. Maxted;D. Queloz;R. West;S. Bentley;B. Enoch;K. Horne;T. Lister;M. Mayor;N. Parley;F. Pepe;D. Pollacco;D. Ségransan;S. Udry;D. Wilson;D. Wilson