Effect of improved atmospheric opacities in modelling sub-Neptunes

dc.contributor.authorMacKenzie, Jasmine
dc.contributor.authorGrenfell, John Lee
dc.contributor.authorBaumeister, Philipp
dc.contributor.authorTosi, Nicola
dc.contributor.authorCabrera, Juan
dc.contributor.authorRauer, Heike
dc.date.accessioned2023-03-24T17:45:49Z
dc.date.available2023-03-24T17:45:49Z
dc.date.issued2023-03-08
dc.description.abstractAims. We investigate the impact of updated atmospheric mean opacity input values on modelled transit radius and the distribution of interior layer mass fractions. Methods. We developed and applied a coupled interior-atmosphere model. Our straightforward semi-grey calculation of atmospheric temperature enables us to perform thousands of model realisations in a Monte Carlo approach to address potential degeneracies in interior and atmospheric mass fraction. Our main constraints are planetary mass and radius from which our model infers distributions of the internal structure of exoplanetary classes ranging from Super-Earth to Mini-Neptune. We varied the relative masses of gas, envelope, mantle, and core layers subject to constraints on the bulk density from observations, and investigated the effect of updating atmospheric mean opacities. Results. First, we validate our model output with observed temperature profiles for modern Neptune. We can reproduce the basic features in the middle atmosphere but not the temperature inversion in the upper layers, which is likely because our model lacks aerosol heating. Calculated interiors are generally consistent with modern Neptune. Second, we compare with the well-studied object GJ 1214 b and obtain results that are broadly consistent with previous findings; they suggest correlations between modelled gas, water, and core mass fractions, although these are generally weak. Updating the opacities leads to a change on the order of a few percent in the modelled transit radius. This is comparable in magnitude to the planned accuracy of the PLATO data for planetary radius, suggesting that the opacity update in the model is important to implement.en
dc.description.sponsorshipDFG, 5424072, SPP 199: Industrieökonomik und Inputmärkte
dc.description.sponsorshipDFG, 280637173, FOR 2440: Materie im Inneren von Planeten - Hochdruck-, Planeten- und Plasmaphysik
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/18458
dc.identifier.urihttps://doi.org/10.14279/depositonce-17267
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften
dc.subject.otherplanetsen
dc.subject.othersatellitesen
dc.subject.otherGJ 1214 ben
dc.subject.otheratmospheresen
dc.subject.othercompositionen
dc.subject.otherfundamental parametersen
dc.subject.otherinteriorsen
dc.titleEffect of improved atmospheric opacities in modelling sub-Neptunes
dc.title.subtitlea case study for GJ 1214 ben
dc.typeArticle
dc.type.versionpublishedVersion
dcterms.bibliographicCitation.articlenumberA65
dcterms.bibliographicCitation.doi10.1051/0004-6361/202141784
dcterms.bibliographicCitation.journaltitleAstronomy & Astrophysics
dcterms.bibliographicCitation.originalpublishernameEDP Sciences
dcterms.bibliographicCitation.originalpublisherplaceLes Ulis
dcterms.bibliographicCitation.volume671
dcterms.rightsHolder.referenceCreative-Commons-Lizenz
tub.accessrights.dnbfree*
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Zentrum für Astronomie und Astrophysik::N/A (Not Applicable)
tub.publisher.universityorinstitutionTechnische Universität Berlin

Files

Original bundle
Now showing 1 - 1 of 1
Loading…
Thumbnail Image
Name:
aa41784-21.pdf
Size:
11.06 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
4.23 KB
Format:
Item-specific license agreed upon to submission
Description:

Collections