The Similar Seven: A Set of Very Alike Exoplanets to Test Correlations between System Parameters and Atmospheric Properties

Abstract Studies of exoplanetary atmospheres have found no definite correlations between observed high-altitude aerosols and other system parameters. This could be, in part, because the lack homogeneous exoplanet samples for which specific parameters can be isolated inspected. Here, we present a set seven exoplanets with very similar We analyze existing photometric time series, Gaia parallax, high-resolution spectroscopic data to produce new stellar, planetary, orbital these systems. With this, confirm that most measured all systems are similar, except host stars’ metallicities possibly high-energy irradiation levels, require UV X-ray observations constrain. From sample, WASP-6b, WASP-96b, WASP-110b transmission spectra use estimate their aerosol coverage levels using Na i doublet 5892.9 Å. find tentative correlation metallicity stars planetary levels. The trend stellar tested by observing remaining planets sample. Based on our prediction, WASP-25b WASP-55b should higher than WASP-124b HATS-29b. Finally, highlight how targeted surveys alike ones presented here might prove key identifying driving factors atmospheric properties future used as sample selection criterion with, e.g., JWST, ARIEL, next generation ground-based telescopes.