Synergies between space telescopes in the photometric characterization of the atmospheres of Hot Jupiters
Date Issued
2019
Author(s)
Abstract
Previous generation of instruments have the opportunity to discover thousands
of extra-solar planets and more will come with the current and future
planet-search missions. In order to go one step further in the characterization
of exoplanets, in this paper we describe a way to compare the photometric
observation of Hot Jupiters done with space telescopes such as HST, CHEOPS,
TESS, PLATO, and JWST and give the first-hand characterization on their
atmospheres. We analyze a set of planetary systems hosting a Hot Jupiter for
which an atmospheric template is available in the literature. For each system,
we simulate the transit light curves observed by different instruments,
convolving the incoming spectrum with the corresponding instrumental
throughput. For each instrument, we thus measure the expected transit depth and
estimate the associated uncertainty. Finally, we compare the transit depths as
seen by the selected instruments and we quantify the effect of the planetary
atmosphere on multi-band transit photometry. We also analyze a set of simulated
scenarios with different stellar magnitudes, activity levels, transit durations
and atmospheric templates to find the best cases for this kind of observational
approach. We find in general that current and especially future space
telescopes provide enough photometric precision to detect significant
differences between the transit depths at different wavelengths. In particular,
we find that the chromatic effect due to the atmosphere of the Hot Jupiters is
maximized at later spectral types and that the effect of stellar activity is
smaller than the measurement uncertainties.
Volume
486
Issue
4
Start page
5867
Issn Identifier
0035-8711
Ads BibCode
2019MNRAS.486.5867S
Rights
open.access
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