Bibliographical noteFunding Information:
The authors thank the referee for insightful comments and suggestions. M.K.A. thanks Mark Marley for useful discussions. R.J.M. thanks Sergei Yurchenko for helpful discussions on molecular line lists. This paper makes use of observations from the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with the Hubble GO program 14767. M.K.A. acknowledges support by the National Science Foundation through a Graduate Research Fellowship. J.S.F. acknowledges support from the Spanish State Research Agency project AYA2016-79425-C3-2-P. Per AAS Journals policy, all supplementary figures are included in this public figshare repository.
© 2021. The American Astronomical Society.