2022A&A...657L...2C


Query : 2022A&A...657L...2C

2022A&A...657L...2C - Astronomy and Astrophysics, volume 657, L2-2 (2022/1-1)

Silicon in the dayside atmospheres of two ultra-hot Jupiters.

CONT D., YAN F., REINERS A., NORTMANN L., MOLAVERDIKHANI K., PALLE E., STANGRET M., HENNING T., RIBAS I., QUIRRENBACH A., CABALLERO J.A., ZAPATERO OSORIO M.R., AMADO P.J., ACEITUNO J., CASASAYAS-BARRIS N., CZESLA S., KAMINSKI A., LOPEZ-PUERTAS M., MONTES D., MORALES J.C., MORELLO G., NAGEL E., SANCHEZ-LOPEZ A., SEDAGHATI E. and ZECHMEISTER M.

Abstract (from CDS):

Atmospheres of highly irradiated gas giant planets host a large variety of atomic and ionic species. Here we observe the thermal emission spectra of the two ultra-hot Jupiters WASP-33b and KELT-20b/MASCARA-2b in the near-infrared wavelength range with CARMENES. Via high-resolution Doppler spectroscopy, we searched for neutral silicon (Si) in their dayside atmospheres. We detect the Si spectral signature of both planets via cross-correlation with model spectra. Detection levels of 4.8σ and 5.4σ, respectively, are observed when assuming a solar atmospheric composition. This is the first detection of Si in exoplanet atmospheres. The presence of Si is an important finding due to its fundamental role in cloud formation and, hence, for the planetary energy balance. Since the spectral lines are detected in emission, our results also confirm the presence of an inverted temperature profile in the dayside atmospheres of both planets.

Abstract Copyright: © ESO 2022

Journal keyword(s): planets and satellites: atmospheres - techniques: spectroscopic - planets and satellites: individual: WASP-33b - planets and satellites: individual: KELT-20b/MASCARA-2b

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 15082 dS* 02 26 51.0582618096 +37 33 01.736482032   8.41 8.14     kA5hA8mF4 177 1
2 HD 15082b Pl 02 26 51.0582746497 +37 33 01.737746137           ~ 296 1
3 WASP-189b Pl? 15 02 44.8679915475 -03 01 52.986005307           ~ 54 0
4 HD 185603 EB* 19 38 38.7352230144 +31 13 09.217127532   7.67 7.58     A0 42 0
5 HD 185603b Pl 19 38 38.7352870670 +31 13 09.215701765           ~ 95 0
6 HD 195689b Pl 20 31 26.3534038246 +39 56 19.765154336           ~ 218 0
7 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1742 1

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2023.01.30-23:21:03

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