HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting One Member of a Stellar Binary
HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting One Member of a Stellar Binary
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DOI：
10.1086/509874
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发表时间：
2006-09
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影响因子：
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通讯作者：
G. Bakos;R. Noyes;G. Kovacs;D. Latham;D. Sasselov;G. Torres;D. Fischer;R. Stefanik;B. Sato;J. Johnson;A. Pál;G. Marcy;R. P. Butler;G. Esquerdo;K. Stanek;J. Lázár;I. Papp;P. Sipocz;Cfa;Hubble Fellow;K. Observatory;E. University;Hungarian Astronomical Association;San Diego State University;O. Observatory;Uc Berkeley;Carnegie;O. University
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文献类型：
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作者：
G. Bakos;R. Noyes;G. Kovacs;D. Latham;D. Sasselov;G. Torres;D. Fischer;R. Stefanik;B. Sato;J. Johnson;A. Pál;G. Marcy;R. P. Butler;G. Esquerdo;K. Stanek;J. Lázár;I. Papp;P. Sipocz;Cfa;Hubble Fellow;K. Observatory;E. University;Hungarian Astronomical Association;San Diego State University;O. Observatory;Uc Berkeley;Carnegie;O. University
HATNet项目利用亚利桑那州和夏威夷的小型自动望远镜，探测到一个物体穿过双星星星系统ADS 16402的一个成员。该系统是一对G 0主序星，年龄约3 Gyr，距离约139 pc，投影距离约1550 Au。该凌日信号的周期为4.46529天，深度为0.015磁等，通过后续的测光和分光，我们发现该天体是一颗质量约为0.53 MJ，半径约为1.36 RJ的“热木星”行星，运行在半长轴为0.055 Au，轨道倾角约为85.9°的轨道上。从而以恒星半径的0.74的撞击参数穿过星星。根据3年的数据集，过境中心的星历为TC = 2453984.397 + Ntr × 4.46529。这颗行星被命名为HAT-P-1b，它的半径至少和以前已知的任何行星一样大，而平均密度却比以前已知的任何行星都小。
Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402. This system is a pair of G0 main-sequence stars with age about 3 Gyr at a distance of ~139 pc and projected separation of ~1550 AU. The transit signal has a period of 4.46529 days and depth of 0.015 mag. From follow-up photometry and spectroscopy, we find that the object is a "hot Jupiter" planet with mass about 0.53MJ and radius ~1.36RJ traveling in an orbit with semimajor axis 0.055 AU and inclination about 85.9°, thus transiting the star at impact parameter 0.74 of the stellar radius. Based on a data set spanning 3 yr, ephemerides for the transit center are TC = 2453984.397 + Ntr × 4.46529. The planet, designated HAT-P-1b, appears to be at least as large in radius, and smaller in mean density, than any previously known planet.