2015ApJ...813...47M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:19:00

2015ApJ...813...47M - Astrophys. J., 813, 47 (2015/November-1)

Model atmospheres of irradiated exoplanets: the influence of stellar parameters, metallicity, and the C/O ratio.

MOLLIERE P., VAN BOEKEL R., DULLEMOND C., HENNING T. and MORDASINI C.

Abstract (from CDS):

Many parameters constraining the spectral appearance of exoplanets are still poorly understood. We therefore study the properties of irradiated exoplanet atmospheres over a wide parameter range including metallicity, C/O ratio, and host spectral type. We calculate a grid of 1D radiative-convective atmospheres and emission spectra. We perform the calculations with our new Pressure-Temperature Iterator and Spectral Emission Calculator for Planetary Atmospheres (PETIT) code, assuming chemical equilibrium. The atmospheric structures and spectra are made available online. We find that atmospheres of planets with C/O ratios ∼1 and Teff ≳ 1500 K can exhibit inversions due to heating by the alkalis because the main coolants CH4, H2O, and HCN are depleted. Therefore, temperature inversions possibly occur without the presence of additional absorbers like TiO and VO. At low temperatures we find that the pressure level of the photosphere strongly influences whether the atmospheric opacity is dominated by either water (for low C/O) or methane (for high C/O), or both (regardless of the C/O). For hot, carbon-rich objects this pressure level governs whether the atmosphere is dominated by methane or HCN. Further we find that host stars of late spectral type lead to planetary atmospheres which have shallower, more isothermal temperature profiles. In agreement with prior work we find that for planets with Teff < 1750 K the transition between water or methane dominated spectra occurs at C/O ∼ 0.7, instead of ∼1, because condensation preferentially removes oxygen.

Abstract Copyright:

Journal keyword(s): methods: numerical - planets and satellites: atmospheres - radiative transfer

VizieR on-line data: <Available at CDS (J/ApJ/813/47): map_list.dat pt/* ab/* sp/*>

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 - 2020
#notes
1 HAT-P-32b Pl 02 04 10.2775457769 +46 41 16.210382751           ~ 89 1
2 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 559 1
3 BD+50 1471b Pl 07 48 06.4726006390 +50 13 32.921121328           ~ 132 1
4 WASP-19b Pl 09 53 40.0764883458 -45 39 33.055979403           ~ 260 1
5 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 211 1
6 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 610 1
7 CD-27 10695b Pl 15 59 50.9489706053 -28 03 42.309432433           ~ 200 1
8 BD+28 2507b Pl 16 02 11.8463105423 +28 10 10.419642379           ~ 160 1
9 HD 149026b Pl 16 30 29.6184841164 +38 20 50.310893575           ~ 298 1
10 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 285 2
11 Kepler-7b Pl 19 14 19.5623271934 +41 05 23.365460942           ~ 159 1
12 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1105 1
13 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1503 1
14 NAME BD+37 4734Bb Pl 22 57 46.8443014981 +38 40 30.355384717           ~ 201 1
15 WASP-6b Pl 23 12 37.7368657624 -22 40 26.277489164           ~ 100 1
16 CD-40 15273b Pl 23 51 31.0840161955 -39 54 24.259966546           ~ 50 1

    Equat.    Gal    SGal    Ecl

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2020.10.19-18:19:00

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