TY  - JOUR
A1  - Keles, Engin
A1  - Mallonn, Matthias
A1  - Kitzmann, Daniel
A1  - Poppenhäger, Katja
A1  - Hoeijmakers, H. Jens
A1  - Ilyin, Ilya
A1  - Alexoudi, Xanthippi
A1  - Carroll, Thorsten A.
A1  - Alvarado-Gomez, Julian
A1  - Ketzer, Laura
A1  - Bonomo, Aldo S.
A1  - Borsa, Francesco
A1  - Gaudi, B. Scott
A1  - Henning, Thomas
A1  - Malavolta, Luca
A1  - Molaverdikhani, Karan
A1  - Nascimbeni, Valerio
A1  - Patience, Jennifer
A1  - Pino, Lorenzo
A1  - Scandariato, Gaetano
A1  - Schlawin, Everett
A1  - Shkolnik, Evgenya
A1  - Sicilia, Daniela
A1  - Sozzetti, Alessandro
A1  - Foster, Mary G.
A1  - Veillet, Christian
A1  - Wang, Ji
A1  - Yan, Fei
A1  - Strassmeier, Klaus G.
T1  - The PEPSI exoplanet transit survey (PETS) I: Investigating the presence of a silicate atmosphere on the super-earth 55 Cnc e
JF  - Monthly notices of the Royal Astronomical Society
N2  - The study of exoplanets and especially their atmospheres can reveal key insights on their evolution by identifying specific atmospheric species. For such atmospheric investigations, high-resolution transmission spectroscopy has shown great success, especially for Jupiter-type planets. Towards the atmospheric characterization of smaller planets, the super-Earth exoplanet 55 Cnc e is one of the most promising terrestrial exoplanets studied to date. Here, we present a high-resolution spectroscopic transit observation of this planet, acquired with the PEPSI instrument at the Large Binocular Telescope. Assuming the presence of Earth-like crust species on the surface of 55 Cnc e, from which a possible silicate-vapor atmosphere could have originated, we search in its transmission spectrum for absorption of various atomic and ionized species such as Fe , Fe (+), Ca , Ca (+), Mg, and K , among others. Not finding absorption for any of the investigated species, we are able to set absorption limits with a median value of 1.9 x R-P. In conclusion, we do not find evidence of a widely extended silicate envelope on this super-Earth reaching several planetary radii.
KW  - planets and satellites: atmospheres
KW  - planets and satellites: composition
Y1  - 2022
U6  - https://doi.org/10.1093/mnras/stac810
SN  - 0035-8711
SN  - 1365-2966
VL  - 513
IS  - 1
SP  - 1544
EP  - 1556
PB  - Oxford University Press
CY  - Oxford
ER  -