2020A&A...641A..47Y


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.05CET00:20:16

2020A&A...641A..47Y - Astronomy and Astrophysics, volume 641A, 47-47 (2020/9-1)

Non-local thermodynamic equilibrium transmission spectrum modelling of HD 209458b.

YOUNG M.E., FOSSATI L., KOSKINEN T.T., SALZ M., CUBILLOS P.E. and FRANCE K.

Abstract (from CDS):


Context. Exoplanetary upper atmospheres are low density environments where radiative processes can compete with collisional ones and introduce non-local thermodynamic equilibrium (NLTE) effects into transmission spectra.
Aims. We develop a NLTE radiative transfer framework capable of modelling exoplanetary transmission spectra over a wide range of planetary properties.
Methods. We adapted the NLTE spectral synthesis code Cloudy to produce an atmospheric structure and atomic transmission spectrum in both NLTE and local thermodynamic equilibrium (LTE) for the hot Jupiter HD 209458b, given a published T-P profile and assuming solar metallicity. Selected spectral features, including Hα, NaI D, HeIλ10 830, FeI andII ultra-violet (UV) bands, and C, O, and Si UV lines, are compared with literature observations and models where available. The strength of NLTE effects are measured for individual spectral lines to identify which features are most strongly affected.
Results. The developed modelling framework that computes NLTE synthetic spectra reproduces literature results for the HeIλ10 830 triplet, the NaI D lines, and the forest of FeI lines in the optical.Individual spectral lines in the NLTE spectrum exhibit up to 40% stronger absorption relative to the LTE spectrum.

Abstract Copyright: © ESO 2020

Journal keyword(s): planets and satellites: general - planets and satellites: individual: HD 209458b - planets and satellites: atmospheres - radiative transfer - techniques: spectroscopic

Simbad objects: 13

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Number of rows : 13

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 572 1
2 CD-38 3220b Pl 07 10 24.0606039387 -39 05 50.570553937           ~ 120 0
3 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 173 1
4 K2-18b Pl 11 30 14.5176249117 +07 35 18.257210626           ~ 53 0
5 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 617 1
6 HAT-P-12b Pl 13 57 33.4668502171 +43 29 36.602501754           ~ 132 1
7 WASP-39b Pl 14 29 18.4151765921 -03 26 40.203046112           ~ 99 1
8 CD-27 10695b Pl 15 59 50.9489706053 -28 03 42.309432433           ~ 202 1
9 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1122 1
10 BD-05 5432b Pl 21 00 06.1969250596 -05 05 40.037007561           ~ 51 1
11 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 1003 1
12 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1520 1
13 NAME BD+37 4734Bb Pl 22 57 46.8443014981 +38 40 30.355384717           ~ 205 1

    Equat.    Gal    SGal    Ecl

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2020.12.05-00:20:16

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