2019ApJ...887..194F


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.18CEST03:05:28

2019ApJ...887..194F - Astrophys. J., 887, 194-194 (2019/December-3)

Impact of clouds and hazes on the simulated JWST transmission spectra of habitable zone planets in the TRAPPIST-1 system.

FAUCHEZ T.J., TURBET M., VILLANUEVA G.L., WOLF E.T., ARNEY G., KOPPARAPU R.K., LINCOWSKI A., MANDELL A., DE WIT J., PIDHORODETSKA D., DOMAGAL-GOLDMAN S.D. and STEVENSON K.B.

Abstract (from CDS):

The TRAPPIST-1 system, consisting of an ultracool host star having seven known Earth-sized planets, will be a prime target for atmospheric characterization with the James Webb Space Telescope (JWST). However, the detectability of atmospheric molecular species may be severely impacted by the presence of clouds and/or hazes. In this work, we perform 3D general circulation model (GCM) simulations with the LMD-G model supplemented by 1D photochemistry simulations at the terminator with the Atmos model to simulate several possible atmospheres for TRAPPIST-1e, 1f, and 1g: (1) modern Earth, (2) Archean Earth, and (3) CO2-rich atmospheres. The JWST synthetic transit spectra were computed using the GSFC Planetary Spectrum Generator. We find that the TRAPPIST-1e, 1f, and 1g atmospheres, with clouds and/or hazes, could be detected using JWST's NIRSpec Prism from the CO2 absorption line at 4.3 µm in less than 15 transits at 3σ or less than 35 transits at 5σ. However, our analysis suggests that other gases would require hundreds (or thousands) of transits to be detectable. We also find that H2O, mostly confined in the lower atmosphere, is very challenging to detect for these planets or similar systems if the planets' atmospheres are not in a moist greenhouse state. This result demonstrates that the use of GCMs, self-consistently taking into account the effect of clouds and subsaturation, is crucial to evaluate the detectability of atmospheric molecules of interest, as well as for interpreting future detections in a more global (and thus robust and relevant) approach.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Radiative transfer

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 593 1
2 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 439 1
3 NAME L 320-124b Pl 10 14 51.7783473599 -47 09 24.189733387           ~ 101 0
4 WASP-31b Pl 11 17 45.3578468391 -19 03 17.216528280           ~ 97 1
5 HAT-P-12b Pl 13 57 33.4668502171 +43 29 36.602501754           ~ 137 1
6 NAME Proxima Centauri b Pl 14 29 42.9451234609 -62 40 46.170818907           ~ 249 0
7 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 574 1
8 G 139-21 PM* 17 15 18.9337265994 +04 57 50.064695682       14.394   M4.5V 256 1
9 Kepler-186f Pl 19 54 36.6536205214 +43 57 18.025893926           ~ 68 0
10 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 881 1
11 TRAPPIST-1 LM* 23 06 29.3684052886 -05 02 29.031690445     18.798 16.466 14.024 M7.5e 585 0
12 TRAPPIST-1g Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 122 0
13 TRAPPIST-1f Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 134 0
14 TRAPPIST-1e Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 160 0
15 WASP-6b Pl 23 12 37.7368657624 -22 40 26.277489164           ~ 106 1
16 HD 219134 Er* 23 13 16.9747821012 +57 10 06.076520993 7.460 6.560 5.570 4.76 4.23 K3V 533 1

    Equat.    Gal    SGal    Ecl

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2021.05.18-03:05:28

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