The Hot Neptune WASP-166 b with ESPRESSO II: Confirmation of atmospheric sodium
The Hot Neptune WASP-166 b with ESPRESSO II: Confirmation of atmospheric sodium
复制标题
Hot Neptune WASP-166 b 与 ESPRESSO II：大气钠的确认
DOI：
10.1093/mnrasl/slac027
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发表时间：
2022
影响因子：
6.5
通讯作者：
D. Sosnowska
中科院分区：
文献类型：
--
作者：
J. Seidel;H. Cegla;L. Doyle;M. Lafarga;M. Brogi;S. Gandhi;D. Anderson;R. Allart;N. Buchschacher;C. Lovis;D. Sosnowska
炎热的海王星沙漠，明显缺乏海王星大小范围内的高辐射行星，仍然是系外行星种群研究中最有趣的结果之一。更深入地了解位于海王星沙漠边缘甚至内部的系外行星的大气层，将使我们能够更好地了解行星的形成或演化过程是否是沙漠的起源。先前使用HARPS光谱仪在3.4 σ处进行了试验性谱线增宽，以检测WASP-166 b中的钠。我们用ESTERO摄谱仪观测到的两次凌日更新了这一结果，证实了每晚的探测和谱线的加宽特征。这一结果标志着海王星沙漠内首次确认的钠检测。在这项工作中，我们还强调了处理低SNR光谱区域的重要性，特别是恒星钠和行星钠的吸收线在中天重叠的地方-这是对系统未来观测的重要警告。
The hot Neptune desert, a distinct lack of highly irradiated planets in the size range of Neptune, remains one of the most intriguing results of exoplanet population studies. A deeper understanding of the atmosphere of exoplanets sitting at the edge or even within the Neptune desert will allow us to better understand if planetary formation or evolution processes are at the origin of the desert. A detection of sodium in WASP-166b was presented previously with tentative line broadening at the 3.4 sigma with the HARPS spectrograph. We update this result with two transits observed with the ESPRESSO spectrograph, confirming the detection in each night and the broadened character of the line. This result marks the first confirmed resolved sodium detection within the Neptune desert. In this work, we additionally highlight the importance of treating low-SNR spectral regions, particularly where absorption lines of stellar sodium and planetary sodium overlap at mid-transit - an important caveat for future observations of the system.