González Picos+ on “The carbon isotope ratio of β Pic b with high-resolution spectroscopy” showing values consistent with the ISM and below Solar levels. Comparison with different exoplanets shows no significant trend with orbital distance or mass of the exoplanet. #astrodon #exoplanets 🔭

Carbon isotopologue ratios for several exoplanets shown as a function of separation from their parent star. Most seem to be close to ISM levels, which are sub-Solar values.Carbon isotopologue ratios for individual nights of Beta Pictoris b. There is very marginal evidence for variability between different nights, suggesting changes in cloud cover.

Matthew Kenworthy @kenworthy