论文标题
热伊及热量的温度倒置:富含氮气中的CN的情况
Temperature inversions on hot super-Earths: the case of CN in nitrogen-rich atmospheres
论文作者
论文摘要
我们表明,在极度辐照的热诞生中,CN的短波吸收可能会引起强烈的温度反转。我们基于先前对55个cancri e的观察结果进行了研究,这使我们相信超短期的超级诞生可以维持富含氮气和/或碳的挥发性大气。我们在辐射感染平衡中计算模型大气,以用于各种富含氮的病例和轨道参数。我们证明了热反演对化学的影响,并计算低分辨率合成发射光谱的范围为0.5-28微米。我们的结果表明,Dueto短波吸收CN,温度高于2000 K和C/o $ $ $ \ geq $ 1.0的气氛容易倒置。 CN是在短期超级诞生的一天中发生的较大温度下极为稳定的少数分子之一。这种大气的发射光谱将与非反向病例有很大不同。在反转的情况下,吸收特征会倒转,显示出高于预期的通量。我们建议在炎热气氛中的反转应该是预期的规范。热土是一些最极端的天然实验室,用于测试大气化学和结构的预测。它们经常发生,发射时明亮,轨道时期短。所有这些因素使它们成为JWST和Ariel任务可观察到的完美候选人。
We show that in extremely irradiated atmospheres of hot super-Earths shortwave absorption of CN can cause strong temperature inversions. We base this study on previous observations of 55 Cancri e, which lead us to believe that ultra-short-period super-Earths can sustain volatile atmospheres, rich in nitrogen and/or carbon. We compute our model atmospheres in a radiative-convective equilibrium for a variety of nitrogen-rich cases and orbital parameters. We demonstrate the effects caused by thermal inversions on the chemistry and compute low resolution synthetic emission spectra for a range of 0.5 - 28 micron. Our results indicate that dueto shortwave absorption of CN, atmospheres with temperatures above 2000 K and C/O $\geq$ 1.0 are prone to thermal inversions. CN is one of the few molecules that is extremely stable at large temperatures occurring on the day side of short period super-Earths. The emission spectrum of such atmospheres will differ substantially from non-inverted cases. In the case of inversions, absorption features become inverted, showing higher than expected flux. We propose that inversions in hot atmospheres should be the expected norm. Hot super-Earths are some of the most extreme natural laboratories for testing predictions of atmospheric chemistry and structure. They are frequently occurring, bright in emission and have short orbital periods. All these factors make them perfect candidates to be observed with JWST and ARIEL missions.