论文标题
在白光下晒日光浴 - 棕色矮人的3D建模 - 白色矮人的气氛浓烈的紫外线照射
Sunbathing under white light -- 3D modelling of brown dwarf - white dwarf atmospheres with strong UV irradiation
论文作者
论文摘要
棕色矮人的大气在其父母的白色矮人近距离绕行代表了一些最极端的辐照环境。了解它们的复杂动力学机制可以推动理论和建模工作的局限性，使它们成为研究以测试当代对辐照气氛的理解的宝贵objets。 We use the Exo-FMS GCM to simulate the brown dwarfs WD0137-349B, SDSS J141126.20+200911.1B and EPIC212235321B, first coupled to a multi-banded grey radiative-transfer scheme then a spectral correlated-k scheme with high temperature opacity tables.然后，我们使用GCMCRT进行后处理GCM结果与可用的观察数据进行比较。我们的GCM模型预测温度强烈的大气，由于紫外线加热的影响，跨越了数十年的压力。我们模型的后处理表明，在GCM结果中，昼夜对比度太小。因此，我们建议在设置这些物体的昼夜温度对比时，云颗粒的形成以及大气阻力效应（例如磁性阻力）是重要的考虑因素。
The atmospheres of brown dwarfs orbiting in close proximity to their parent white dwarf represent some of the most extreme irradiated environments known. Understanding their complex dynamical mechanisms pushes the limits of theoretical and modelling efforts, making them valuable objets to study to test contemporary understanding of irradiated atmospheres. We use the Exo-FMS GCM to simulate the brown dwarfs WD0137-349B, SDSS J141126.20+200911.1B and EPIC212235321B, first coupled to a multi-banded grey radiative-transfer scheme then a spectral correlated-k scheme with high temperature opacity tables. We then post-process the GCM results using gCMCRT to compare to available observational data. Our GCM models predict strongly temperature inverted atmospheres, spanning many decades in pressure due to impact of UV band heating. Post-processing of our models suggest that the day-night contrast is too small in the GCM results. We therefore suggest that the formation of cloud particles as well as atmospheric drag effects such as magnetic drag are important considerations in setting the day-night temperature contrast for these objects.
