论文标题
AESOPUS 2.0的低温气体泥泞
Low-Temperature Gas Opacities with AESOPUS 2.0
论文作者
论文摘要
这项工作介绍了3.2 <= log（t/k）<= 4.5的新的低温气体不相处，该范围内用Aesopus代码计算的热力学平衡（Marigo＆_aringer_2009）。与以前的Aesopus 1.0版本相比，我们更新并扩展了分子吸收，包括80种，主要使用当前从Exomol和Hitran数据库中获得的建议线列表。此外，鉴于最近的一项研究，我们修订了H-光检查横截面，增加了其他原子和分子负极离子的无免费吸收，并更新了由于H2/H2，H2/H，H2/HE，H2/HE和H/H/HE-H/HE PAIRS引起的碰撞诱导的吸收。使用新的输入物理，我们计算了Rosseland的表平均不粘度，用于几种尺度 - 极性化学成分，包括Magg等。 （2022）最近的α增强混合物。讨论了新的Aesopus 2.0与原始AESOPUS 1.0版本以及其他一组计算之间的不透明度差异。新的不相处是通过专门的网页发布给社区的，其中包括用于广泛使用的化学成分的预计表格，以及用于计算任何丰度分布的不透明的Web-Interface。
This work introduces new low-temperature gas opacities, in the range 3.2 <= log(T/K) <= 4.5, computed with the AESOPUS code under the assumption of thermodynamic equilibrium (Marigo &_Aringer_2009). In comparison to the previous version AESOPUS 1.0, we updated and expanded molecular absorption to include 80 species, mostly using the recommended line lists currently available from the ExoMol and HITRAN databases. Furthermore, in light of a recent study, we revised the H- photodetachment cross section, added the free-free absorption of other negative ions of atoms and molecules, and updated the collision-induced absorption due to H2/H2, H2/H, H2/He, and H/He pairs. Using the new input physics, we computed tables of Rosseland mean opacities for several scaled-solar chemical compositions, including Magg et al. (2022)'s most recent one, as well as alpha-enhanced mixtures. The differences in opacity between the new AESOPUS 2.0 and the original AESOPUS 1.0 versions, as well as other sets of calculations, are discussed. The new opacities are released to the community via a dedicated web-page that includes both pre-computed tables for widely used chemical compositions, and a web-interface for calculating opacities on-the-fly for any abundance distribution.
