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Planetary magnetism as a parameter in exoplanet habitability

机译:行星磁性作为外产居住地的参数

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Evidence from the Solar system suggests that, unlike Venus and Mars, the presence of a strong magnetic dipole moment on Earth has helped maintain liquid water on its surface. Therefore, planetary magnetism could have a significant effect on the long-term maintenance of atmosphere and liquid water on rocky exoplanets. We use Olson & Christensen's (2006) model to estimate magnetic dipole moments of rocky exoplanets with radii R-p <= 1.23 R-circle plus. Even when modelling maximum magnetic dipole moments, only Kepler-186 f has a magnetic dipole moment larger than the Earth's, while approximately half of rocky exoplanets detected in the circumstellar habitable zone have a negligible magnetic dipole moment. This suggests that planetary magnetism is an important factor when prioritizing observations of potentially habitable planets.
机译:来自太阳系的证据表明,与金星和火星不同,地球上强大的磁性偶极矩的存在有助于将液态水保持在其表面上。因此,行星磁性可能对岩石外岩上的大气和液态水的长期维护产生显着影响。我们使用Olson&Christensen(2006)模型用半径R-P <= 1.23 R圈加估算岩石外肌的磁性偶极矩。即使在建模最大磁性偶极矩时,只有开普勒-186f的磁性偶极矩也大于地球,而在星际居住区中检测到的大约一半的岩石外产网具有可忽略的磁性偶极矩。这表明行星磁性是在优先考虑潜在居住的行星的观察时是一个重要因素。

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