HAT-P-3b: A Heavy-Element-rich Planet Transiting a K Dwarf Star
HAT-P-3b: A Heavy-Element-rich Planet Transiting a K Dwarf Star
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DOI：
10.1086/521792
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发表时间：
2007-07
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影响因子：
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通讯作者：
G. Torres;G. Bakos;G. Kovacs;D. Latham;J. Fernández;R. Noyes;G. Esquerdo;A. Sozzetti;D. Fischer;R. P. Butler;G. Marcy;R. Stefanik;D. Sasselov;J. Lázár;I. Papp;P. S. K. Observatory;H. I. -. O. A. D. Torino;Italy University of Southern California;Berkeley Hungarian Astronomical Association;Hungary
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文献类型：
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作者：
G. Torres;G. Bakos;G. Kovacs;D. Latham;J. Fernández;R. Noyes;G. Esquerdo;A. Sozzetti;D. Fischer;R. P. Butler;G. Marcy;R. Stefanik;D. Sasselov;J. Lázár;I. Papp;P. S. K. Observatory;H. I. -. O. A. D. Torino;Italy University of Southern California;Berkeley Hungarian Astronomical Association;Hungary
我们报告发现一颗木星大小的行星凌日一颗相对明亮（V = 11.56）且富含金属的早期K矮星，周期约为2.9天。通过光度和光谱学分析，我们确定了HAT-P-3b行星的质量和半径分别为Mp = 0.599±0.026 MJup和Rp = 0.890±0.046 RJup。相对于它的质量来说，这个物体的体积相对较小，这意味着它存在大约75 M⊕的重元素（占总质量的~），这是基于目前的辐射系外巨行星理论，类似于从凌日行星HD 149026b推断出的核心质量。HAT-P-3b的体积密度ρp = 1.06±0.17 g cm-3，与恒星的轨道距离为0.03894 AU。凌日中心的星历表为Tc = 2,454,218.7594±0.0029 + N ×（2.899703±0.000054）（hdd）。
We report the discovery of a Jupiter-size planet transiting a relatively bright (V = 11.56) and metal-rich early K dwarf star with a period of ~2.9 days. On the basis of follow-up photometry and spectroscopy we determine the mass and radius of the planet, HAT-P-3b, to be Mp = 0.599 ± 0.026 MJup and Rp = 0.890 ± 0.046 RJup. The relatively small size of the object for its mass implies the presence of about 75 M⊕ worth of heavy elements (~ of the total mass) based on current theories of irradiated extrasolar giant planets, similar to the mass of the core inferred for the transiting planet HD 149026b. The bulk density of HAT-P-3b is found to be ρp = 1.06 ± 0.17 g cm-3, and the planet orbits the star at a distance of 0.03894 AU. Ephemerides for the transit centers are Tc = 2,454,218.7594 ± 0.0029 + N × (2.899703 ± 0.000054) (HJD).