English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Inverse techniques are used to extract information about an exoplanet'satmosphere. These techniques are prone to biased results if the appropriateforward model is not used. One assumption used in a forward model is to assumethat the radius of the planet is constant with wavelength, however a morerealistic assumption is that the photospheric radius varies with eachwavelength. We explore the bias induced when attempting to extract themolecular abundance from an emission spectrum which was generated with avariable radius. We find that for low gravity planets, the retrieval model isnot able to fit the data if a constant radius model is used. We find thatbiased results are obtained when studying a typical hot Jupiter in the MIRI LRSwavelength range. Finally, we show that high gravity planets do not suffer abias. We recommend that future spectral retrievals that interpret exoplanetemission spectra should take into account a variable radius.

Impact of Variable Photospheric Radius on Exoplanet Atmospheric Retrievals