Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
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DOI：
10.1126/science.1151947
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发表时间：
2008-02
期刊：
影响因子：
56.9
通讯作者：
B. Gaudi;David P. Bennett;A. Udalski;A. Gould;G. Christie;D. Maoz;Subo Dong;J. Mccormick;M. S
中科院分区：
文献类型：
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作者：
B. Gaudi;David P. Bennett;A. Udalski;A. Gould;G. Christie;D. Maoz;Subo Dong;J. Mccormick;M. S
对太阳系外行星的研究已经发现了惊人的行星系统多样性，但太阳系类似物的频率仍然未知。引力微透镜行星搜索方法可能对包含除水星外所有太阳系行星类似物的多行星系统敏感。我们报告的微透镜的多行星系统的检测。我们发现两颗行星的质量分别是木星质量的1.071和1.027倍，轨道间距分别为1.23和1.46天文单位，它们绕着一颗质量为1.050太阳质量的主星星运行，距离为1.5千秒差距。这个系统类似于我们太阳系的比例版本，因为行星的质量比，分离比和平衡温度与木星和土星相似。这些行星不可能用其他技术探测到;它们的发现仅来自六个确认的微透镜行星探测，表明太阳系类似物可能很常见。
Searches for extrasolar planets have uncovered an astonishing diversity of planetary systems, yet the frequency of solar system analogs remains unknown. The gravitational microlensing planet search method is potentially sensitive to multiple-planet systems containing analogs of all the solar system planets except Mercury. We report the detection of a multiple-planet system with microlensing. We identify two planets with masses of ∼0.71 and ∼0.27 times the mass of Jupiter and orbital separations of ∼2.3 and ∼4.6 astronomical units orbiting a primary star of mass ∼0.50 solar mass at a distance of ∼1.5 kiloparsecs. This system resembles a scaled version of our solar system in that the mass ratio, separation ratio, and equilibrium temperatures of the planets are similar to those of Jupiter and Saturn. These planets could not have been detected with other techniques; their discovery from only six confirmed microlensing planet detections suggests that solar system analogs may be common.