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arXiv 1909.02646astro-ph.EPphysics.chem-ph
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ExoMol分子线列表XXXVI：$X\ {}^2Π- X\ {}^2Π$和SH的$A\ {}^2Σ^+ - X\ {}^2Π$跃迁

ExoMol molecular line lists XXXVI: $X\ {}^2Π- X\ {}^2Π$ and $A\ {}^2Σ^+ - X\ {}^2Π$ transitions of SH

Maire N. Gorman, Sergei N. Yurchenko, Jonathan Tennyson

发表信息：
MNRAS 490, 1652-1665 (2009)
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摘要：

给出了巯基SH的转动、振转和振转跃迁的GYT谱线表。这项工作扩展并取代了SNaSH行列表[Yurchenko等人，2018，MNRAS，478，270]，仅涵盖地面（电子）$X$ $^{2}Π$状态。这一扩展是由SH的紫外特征的初步鉴定所促使的，SH在超热木星系外行星WASP-121 b的透射光谱中具有重要性[Evans等人，2018年，AJ.，156，283]。这个GYT线列表模型是通过拟合经验势能，自旋轨道和电子角动量函数$X$ $^{2}Π$和$A$ $^{2}Σ^{+}$状态内的实验测量的波长和$A$ $^{2}Σ^{+}$ - $X$ $^{2}Π$带系统使用从头算曲线作为起始参考点。拟合与所引用的$\sim$ 0.03 - 0.3 cm $^{-1}$实验数据的不确定度一致。的GYT线列表涵盖波长长于0.256 $μ$ m，并包括7686 rovibronic态和572 145跃迁的$^{32}$ SH。生成$^{33}$ SH、$^{34}$ SH、$^{36}$ SH和$^{32}$ SD同位素体的行列表，包括考虑SD的非Born-Oppenheimer效应。行列表可从CDS（http：//www.example.com）和ExoMol（www.exomol.com）数据库获得。cdsarc.u-strasbg.fr

英文摘要：

The GYT line list covering rotational, rovibrational and rovibronic transitions of the mercapto radical SH is presented. This work extends and replaces the SNaSH line list [Yurchenko et al., 2018, MNRAS, 478, 270] which covers the ground (electronic) $X$ $^{2}Π$ state only. This extension is prompted by the tentative identification of the ultra-violet features of SH as being of importance in the transmission spectrum of the ultra-hot Jupiter exoplanet WASP-121b [Evans et al., 2018, AJ., 156, 283]. This GYT line list model is generated by fitting empirical potential energy, spin-orbit and electronic angular momenta functions to experimentally measured wavelengths within the $X$ $^{2}Π$ and $A$ $^{2}Σ^{+}$ states and to the $A$ $^{2}Σ^{+}$ - $X$ $^{2}Π$ band system using ab initio curves as a starting reference point. The fits are compatible with the quoted uncertainty of the experimental data used of $\sim$ 0.03 - 0.3 cm$^{-1}$. The GYT line list covers wavelengths longer than 0.256 $μ$m and includes 7686 rovibronic states and 572 145 transitions for $^{32}$SH. Line lists for the $^{33}$SH, $^{34}$SH, $^{36}$SH and $^{32}$SD isotopologues are generated including a consideration of non-Born-Oppenheimer effects for SD. The line lists are available from the CDS (http://cdsarc.u-strasbg.fr) and ExoMol (www.exomol.com) data bases.

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