WASP-12b: THE HOTTEST TRANSITING EXTRASOLAR PLANET YET DISCOVERED
WASP-12b: THE HOTTEST TRANSITING EXTRASOLAR PLANET YET DISCOVERED
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WASP-12b：迄今为止发现的最热的凌日系外行星
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
P. Wheatley
中科院分区：
文献类型：
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作者：
L. Hebb;A. Collier;B. Loeillet;D. Pollacco;G. Hébrard;R. Street;F. Bouchy;H. C. Stempels;C. Moutou;E. Simpson;S. Udry;Y. Joshi;R. West;I. Skillen;D. Wilson;I. McDonald;N. Gibson;S. Aigrain;D. Anderson;C. Benn;D. Christian;B. Enoch;C. Haswell;C. Hellier;K. Horne;J. Irwin;T. Lister;P. Maxted;M. Mayor;A. Norton;N. Parley;F. Pont;D. Queloz;B. Smalley;P. Wheatley
WASP-12 b是一颗新的凌日系外行星，Rpl = 1.79+0.09− 0.09 RJ，Mpl = 1.41+0.10−0.10 MJ。行星和宿主星星的性质是从凌日光度和径向速度数据的蒙特卡罗马尔可夫链分析中得出的。此外，通过比较恒星光谱与理论光谱和恒星演化模型，我们确定宿主星星是一颗超太阳金属丰度（[M/H] = 0.3+0.05−0.15），晚F（Teff = 6300+200−100 K）的星星，它正在从零年龄主序演化。这颗行星的平衡温度为Teq = 2516 K，这是由于它围绕着一颗热的12等主星星运行的周期很短（P = 1.09天）。WASP-12 b是迄今为止发现的所有过境行星中半径最大的。它也是文献中辐射最严重和周期最短的行星。
We report on the discovery of WASP-12b, a new transiting extrasolar planet with Rpl = 1.79+0.09−0.09 RJ and Mpl = 1.41+0.10−0.10 MJ. The planet and host star properties were derived from a Monte Carlo Markov Chain analysis of the transit photometry and radial velocity data. Furthermore, by comparing the stellar spectrum with theoretical spectra and stellar evolution models, we determined that the host star is a supersolar metallicity ([M/H] = 0.3+0.05−0.15), late-F (Teff = 6300+200−100 K) star which is evolving off the zero-age main sequence. The planet has an equilibrium temperature of Teq = 2516 K caused by its very short period orbit (P = 1.09 days) around the hot, twelfth magnitude host star. WASP-12b has the largest radius of any transiting planet yet detected. It is also the most heavily irradiated and the shortest period planet in the literature.