标题： 宿主恒星宜居带内的类地行星的概率分布 显示英文标题

标题： Probability Distribution of Terrestrial Planets in Habitable Zones around Host Stars

摘要： 随着越来越多的系外行星被探测到，人们更加关注太阳系外是否存在生命。 我们尝试获取宜居带中外星系宿主恒星周围类地行星的宜居带和概率分布。 利用Eggleton的代码，我们计算了质量小于4.00 \mo 的恒星演化。 我们还使用了恒星光度和半径的拟合公式、宜居带的边界通量、行星的半长轴和质量分布以及恒星的初始质量函数。 我们获得了质量从0.08到4.00 \mo 恒星的光度和半径，并根据恒星有效温度计算了宿主恒星的宜居带。 我们得到了宿主恒星周围宜居带内类地行星的概率分布。 我们还计算出银河系中宿主恒星宜居带内的类地行星数量为455亿颗，其中K型恒星周围的宜居带内的类地行星数量最多。 显示英文摘要

摘要： With more and more exoplanets being detected, it is paid closer attention to whether there are lives outside solar system. We try to obtain habitable zones and the probability distribution of terrestrial planets in habitable zones around host stars. Using Eggleton's code, we calculate the evolution of stars with masses less than 4.00 \mo. We also use the fitting formulae of stellar luminosity and radius, the boundary flux of habitable zones, the distribution of semimajor axis and mass of planets and the initial mass function of stars. We obtain the luminosity and radius of stars with masses from 0.08 to 4.00 \mo, and calculate the habitable zones of host stars, affected by stellar effective temperature. We achieve the probability distribution of terrestrial planets in habitable zones around host stars. We also calculate that the number of terrestrial planets in habitable zones of host stars is 45.5 billion, and the number of terrestrial planets in habitable zones around K type stars is the most, in the Milky Way.