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http://hdl.handle.net/20.500.12386/32074
Titolo: | Probing the atmosphere of HD189733b with the Na I and K I lines | Autori: | Keles, E. Kitzmann, D. Mallonn, M. Alexoudi, X. Fossati, L. Pino, Lorenzo Seidel, J. V. Carroll, T. A. Steffen, M. Ilyin, I. Poppenhäger, K. Strassmeier, K. G. von Essen, C. NASCIMBENI, VALERIO Turner, J. D. |
Data pubblicazione: | 2020 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 498 | Fascicolo: | 1 | Da pagina:: | 1023 | Abstract: | High spectral resolution transmission spectroscopy is a powerful tool to characterize exoplanet atmospheres. Especially for hot Jupiters, this technique is highly relevant, due to their high-altitude absorption, e.g. from resonant sodium (Na I) and potassium (K I) lines. We resolve the atmospheric K I absorption on HD189733b with the aim to compare the resolved K I line and previously obtained high-resolution Na I-D line observations with synthetic transmission spectra. The line profiles suggest atmospheric processes leading to a line broadening of the order of ˜10 km/s for the Na I-D lines and only a few km/s for the K I line. The investigation hints that either the atmosphere of HD189733b lacks a significant amount of K I or the alkali lines probe different atmospheric regions with different temperature, which could explain the differences we see in the resolved absorption lines. | URI: | http://hdl.handle.net/20.500.12386/32074 | URL: | https://academic.oup.com/mnras/article-abstract/498/1/1023/5892592?redirectedFrom=fulltext&login=false | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/staa2435 | Bibcode ADS: | 2020MNRAS.498.1023K | Fulltext: | open |
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