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Evaluating the effect of four unknown parameters included in a latitudinal energy balance model on the habitability of exoplanets
Open Astronomy ( IF 0.5 ) Pub Date : 2020-12-31 , DOI: 10.1515/astro-2020-0021
Majid Bahraminasr 1 , S. Javad Jafarzadeh 1 , Fatemeh Montazeri 1 , Atila Poro 1 , Soroush Sarabi 1
Affiliation  

Abstract Among different models for determining the habitable zone (HZ) around a star, a Latitudinal Energy Balance Model (LEBM) is very beneficial due to its parametricity which keeps a good balance between complexity and simulation time. This flexibility makes the LEBM an excellent tool to assess the impact of some key physical parameters on the temperature and the habitability of a planet. Among different physical parameters, some of them, up until now, cannot be determined by any method such as the planet’s spin obliquity, diurnal period, ocean-land ratio, and pressure level. Here we apply this model to study the effect of these unknown parameters on the habitability of three exoplanets located in the inner, outer, and middle of their optimistic HZ. Among the examined parameters, the impact of pressure is more straightforward. It has a nearly direct relation with temperature and also with the habitability in the case of a cold planet. The effect of other parameters is discussed with details. To quantify the impact of all these unknown parameters we utilize a statistical interface which provides us with the conditional probability on habitability status of each planet.

中文翻译:

评估包含在纬度能量平衡模型中的四个未知参数对系外行星宜居性的影响

摘要 在确定恒星周围宜居带(HZ)的不同模型中,纬度能量平衡模型(LEBM)因其参数化在复杂性和模拟时间之间保持良好平衡而非常有益。这种灵活性使 LEBM 成为评估一些关键物理参数对行星温度和宜居性影响的绝佳工具。在不同的物理参数中,有一些直到现在还不能用地球自转倾角、昼夜周期、海陆比、压力水平等任何方法来确定。在这里,我们应用这个模型来研究这些未知参数对位于其乐观 HZ 内部、外部和中部的三颗系外行星的宜居性的影响。在检查的参数中,压力的影响更为直接。它与温度几乎直接相关,并且在冷行星的情况下也与宜居性相关。详细讨论了其他参数的影响。为了量化所有这些未知参数的影响,我们使用了一个统计接口,该接口为我们提供了每个行星宜居状态的条件概率。
更新日期:2020-12-31
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