Near-infrared Chemical Inventory of the Atmosphere of 55 Cancri e
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00547825" target="_blank" >RIV/67985815:_____/21:00547825 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-3881/abe768" target="_blank" >https://doi.org/10.3847/1538-3881/abe768</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-3881/abe768" target="_blank" >10.3847/1538-3881/abe768</a>
Alternative languages
Result language
angličtina
Original language name
Near-infrared Chemical Inventory of the Atmosphere of 55 Cancri e
Original language description
We present high-resolution near-infrared spectra taken during eight transits of 55 Cancri e, a nearby low-density super-Earth with a short orbital period (<18 hr). While this exoplanet's bulk density indicates a possible atmosphere, one has not been detected definitively. Our analysis relies on the Doppler cross-correlation technique, which takes advantage of the high spectral resolution and broad wavelength coverage of our data, to search for the thousands of absorption features from hydrogen-, carbon-, and nitrogen-rich molecular species in the planetary atmosphere. Although we are unable to detect an atmosphere around 55 Cancri e, we do place strong constraints on the levels of HCN, NH3, and C2H2 that may be present. In particular, at a mean molecular weight of 5 amu, we can rule out the presence of HCN in the atmosphere down to a volume mixing ratio (VMR) of 0.02%, NH3 down to a VMR of 0.08%, and C2H2 down to a VMR of 1.0%. If the mean molecular weight is relaxed to 2 amu, we can rule out the presence of HCN, NH3, and C2H2 down to VMRs of 0.001%, 0.0025%, and 0.08%, respectively. Our results reduce the parameter space of possible atmospheres consistent with the analysis of Hubble Space Telescope/WFC3 observations by Tsiaras et al. and indicate that if 55 Cancri e harbors an atmosphere, it must have a high mean molecular weight or clouds.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomical Journal
ISSN
0004-6256
e-ISSN
1538-3881
Volume of the periodical
161
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
27
Pages from-to
209
UT code for WoS article
000637831300001
EID of the result in the Scopus database
2-s2.0-85108181328