The Transiting Extrasolar Giant Planet around the Star OGLE-TR-113
The Transiting Extrasolar Giant Planet around the Star OGLE-TR-113
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DOI：
10.1086/422600
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发表时间：
2004-04
期刊：
影响因子：
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通讯作者：
M. Konacki;G. Torres;D. Sasselov;G. Pietrzyński;A. Udalski;S. Jha;M. Ruiz;W. Gieren;D. Minniti
中科院分区：
文献类型：
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作者：
M. Konacki;G. Torres;D. Sasselov;G. Pietrzyński;A. Udalski;S. Jha;M. Ruiz;W. Gieren;D. Minniti
我们报告了在 OGLE-TR-113（光学引力透镜实验的候选恒星）周围独立发现的一颗新的太阳系外凌日行星。根据 2003 年在拉斯坎帕纳斯天文台（智利）的麦哲伦 I（巴德）望远镜上使用 MIKE 摄谱仪进行的观测，检测到了微小的径向速度变化。我们还进行了光曲线分析，结合了新的光度测量和恒星的真实物理参数。 OGLE-TR-113b的轨道周期仅为1.43天，质量为(1.08±0.28)MJup，半径为(1.09±0.10)RJup。 Bouchy 等人最近根据一年后的观察结果进行了一项独立研究，获得了类似的参数。 OGLE-TR-113b 和先前宣布的行星 OGLE-TR-56b（Porb = 1.21 天）——前两个通过光度测量发现的行星——的轨道周期比高精度视向速度勘测中发现的近距离巨行星 3-4 天的明显截止周期要短得多。 Bouchy 等人报告的第三个病例。 （OGLE-TR-132b，Porb = 1.69 天），这些天体似乎形成了一类新的“非常热的木星”，为理论研究提出了非常有趣的问题。
We report the independent discovery of a new extrasolar transiting planet around OGLE-TR-113, a candidate star from the Optical Gravitational Lensing Experiment. Small radial velocity variations have been detected based on observations conducted with the MIKE spectrograph on the Magellan I (Baade) telescope at the Las Campanas Observatory (Chile) during 2003. We have also carried out a light-curve analysis incorporating new photometry and realistic physical parameters for the star. OGLE-TR-113b has an orbital period of only 1.43 days, a mass of (1.08 ± 0.28)MJup, and a radius of (1.09 ± 0.10)RJup. Similar parameters have been obtained very recently in an independent study by Bouchy et al., from observations taken a year later. The orbital period of OGLE-TR-113b and the previously announced planet OGLE-TR-56b (Porb = 1.21 days)—the first two found photometrically—are much shorter than the apparent cutoff of close-in giant planets at 3-4 day periods found in high-precision radial velocity surveys. Along with a third case reported by Bouchy et al. (OGLE-TR-132b, Porb = 1.69 days), these objects appear to form a new class of "very hot Jupiters" that pose very interesting questions for theoretical study.