双自由参数地球相似指数
Earth Similarity Index with two free parameters
摘要：
本文导出了具有两个自由参数m和T的地球相似性指数（ESI）。考虑到火星几乎与地球相似，这些自由参数被优化。对于自由参数的优化值，计算了一些行星的轨道ESI、表面ESI和ESI。将m = 0.8和T = 0.8的结果与Schulze-Makuch { \it et al.}（2011年）。我们已经发现系外行星55 Cnc f距离阈值T的距离在10%以内。发现系外行星HD 69830 c，55 Cnc c，55 Cnc f，61 Vir d和HIP 57050 b的ESI在阈值的10%以内。
英文摘要：
We have derived Earth Similarity Index (ESI) with two free parameters m and T. These free parameters are optimized with the consideration that the planet Mars is almost similar to the Earth. For the optimized values of free parameters, the interior-ESI, surface-ESI and ESI for some planets are calculated. The results for m = 0.8 and T = 0.8 are compared with the values obtained by Schulze-Makuch {\it et al.} (2011). We have found that the exoplanet 55 Cnc f is within 10% away from the threshold value T. The exoplanets HD 69830 c, 55 Cnc c, 55 Cnc f, 61 Vir d and HIP 57050 b are found to have ESI within 10% from the threshold value.
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