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

The planet in the WASP-103 system is an excellent candidate for transmissionspectroscopy because of its large radius and high temperature. Application ofthis technique found a variation of radius with wavelength which was far toostrong to be explained by scattering processes in the planetary atmosphere. Afaint nearby star was subsequently detected, whose contamination of the transitlight curves might explain this anomaly. We present a reanalysis of publisheddata in order to characterise the faint star and assess its effect on themeasured transmission spectrum. The faint star has a mass of 0.72 +/- 0.08 Msunand is almost certainly gravitationally bound to the planetary system. We findthat its effect on the measured physical properties of the planet and host staris small, amounting to a planetary radius larger by 0.6 sigma and planetarydensity smaller by 0.8 sigma. Its influence on the measured transmissionspectrum is much greater: the spectrum now has a minimum around 760 nm andopacity rises to both bluer and redder wavelengths. It is a poor match totheoretical spectra and the spectral slope remains too strong for Rayleighscattering. The existence of the faint nearby star cannot therefore explain themeasured spectral properties of this hot and inflated planet. We advocatefurther observations of the system, both with high spatial resolution in orderto improve the measured properties of the faint star, and with higher spectralresolution to confirm the anomalous transmission spectrum of the planet.

Contamination from a nearby star cannot explain the anomalous transmission spectrum of the ultra-short period giant planet WASP-103b