Exoplanetary cloud retrieval using YunMa in transit spectroscopy

<p>Transit spectroscopy is an effective method for the atmospheric study of exoplanets. However, clouds impose uncertainties in constraining the atmospheric parameters. The current exoplanetary study is awaiting improvement in analysing clouds in transit spectra with the retrieval technique and within reasonable computational time. Therefore, we developed YunMa, an optimised cloud microphysics model for transit spectroscopy. We took advantage of TauREx 3 (Al-Refaie et al. 2019, 2021), an open code framework for simulating exoplanetary spectra to enable the retrieval function of YunMa. We validated our model by comparing our simulation with previous literature results. We evaluated the retrieval performances on a synthetic temperate sub-Neptune. We, therefore, concluded that this work did the first transit spectral retrieval with parametric cloud microphysics included and proposed feasible applications with YunMa.</p>