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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32074
Title: Probing the atmosphere of HD189733b with the Na I and K I lines
Authors: 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.
Issue Date: 2020
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 498
Issue: 1
First Page: 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
Appears in Collections:1.01 Articoli in rivista

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