WASP-19b: THE SHORTEST PERIOD TRANSITING EXOPLANET YET DISCOVERED
WASP-19b: THE SHORTEST PERIOD TRANSITING EXOPLANET YET DISCOVERED
复制标题
WASP-19b：迄今为止发现的周期最短的凌日系外行星
DOI：
10.1088/0004-637x/708/1/224
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
P. Wheatley
中科院分区：
文献类型：
--
作者：
L. Hebb;A. Collier;A. Triaud;T. Lister;B. Smalley;P. Maxted;C. Hellier;D. Anderson;D. Pollacco;M. Gillon;M. Gillon;D. Queloz;R. West;S. Bentley;B. Enoch;C. Haswell;K. Horne;M. Mayor;F. Pepe;D. Ségransan;I. Skillen;S. Udry;P. Wheatley
我们报告发现了一颗新的极短周期凌日系外行星WASP-19 b。该行星的质量Mpl = 1.15 ± 0.08 MJ，半径Rpl = 1.31 ± 0.06 RJ，轨道周期P = 0.7888399 ± 0.000008天。通过光谱分析，我们确定该主星星星是一颗金属丰度（[M/H] = 0.1 ± 0.1 dex）略超太阳的G矮星，Teff = 5500 ± 100 K。此外，我们检测到周期性的，正弦通量变化的光变曲线，用于推导出旋转周期的星星的质子= 10.5 ± 0.2天。相对较短的恒星自转周期表明，WASP-19有些年轻（约600万年前），或者两个天体之间的潮汐相互作用导致行星在其一生中向内螺旋，导致星星向上旋转。由于对自转周期的探测，如果能确定更精确的年龄，该系统有可能对恒星潮汐质量因子Q′s施加强约束。
We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass Mpl = 1.15 ± 0.08 MJ, radius Rpl = 1.31 ± 0.06 RJ, and orbital period P = 0.7888399 ± 0.0000008 days. Through spectroscopic analysis, we determine the host star to be a slightly super-solar metallicity ([M/H] = 0.1 ± 0.1 dex) G-dwarf with Teff = 5500 ± 100 K. In addition, we detect periodic, sinusoidal flux variations in the light curve which are used to derive a rotation period for the star of Prot = 10.5 ± 0.2 days. The relatively short stellar rotation period suggests that either WASP-19 is somewhat young (∼ 600 Myr old) or tidal interactions between the two bodies have caused the planet to spiral inward over its lifetime resulting in the spin-up of the star. Due to the detection of the rotation period, this system has the potential to place strong constraints on the stellar tidal quality factor, Q′s, if a more precise age is determined.
DOI：
10.1088/0004-637x/709/1/159
发表时间：
2009-08
期刊：
The Astrophysical Journal
影响因子：
--
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