Editing Hydroxy group (section)

===Exoplanets===
In 2021, evidence for OH in the dayside atmosphere of the exoplanet [[WASP-33b]] was found in its emission spectrum at wavelengths between 1 and 2 micrometers.<ref>{{cite journal |author=Stevanus K. Nugroho |author2=Hajime Kawahara |author3=Neale P. Gibson |author4=Ernst J. W. de Mooij |author5=Teruyuki Hirano |author6=Takayuki Kotani |author7=Yui Kawashima |author8=Kento Masuda |author9=Matteo Brogi |author10=Jayne L. Birkby |author11=Chris A. Watson |author12=Motohide Tamura |author13=Konstanze Zwintz |author14=Hiroki Harakawa |author15=Tomoyuki Kudo |author16=Masayuki Kuzuhara |author17=Klaus Hodapp |author18=Masato Ishizuka |author19=Shane Jacobson |author20=Mihoko Konishi |author21=Takashi Kurokawa |author22=Jun Nishikawa |author23=Masashi Omiya |author24=Takuma Serizawa |author25=Akitoshi Ueda |author26=Sébastien Vievard |title=First Detection of Hydroxyl Radical Emission from an Exoplanet Atmosphere: High-dispersion Characterization of {WASP}-33b Using Subaru/{IRD} |journal=Astrophysical Journal Letters |volume=910 |pages=L9 |year=2021 |issue=1 |doi=10.3847/2041-8213/abec71 |s2cid=232110452 |url=https://pureadmin.qub.ac.uk/ws/files/237491214/2103.03094v1.pdf |doi-access=free }}</ref> Evidence for OH in the atmosphere of exoplanet [[WASP-76b]] was subsequently found.<ref>{{cite journal |author=R. Landman |author2=A. Sánchez-López |author3=P. Mollière |author4=A. Y. Kesseli |author5=A. J. Louca |author6=I. A. G. Snellen |title=Detection of OH in the ultra-hot Jupiter WASP-76b
 |journal=Astronomy and Astrophysics |volume=656 |pages=A119 |year=2021 |issue=1 | doi = 10.1051/0004-6361/202141696  |doi-access=free |arxiv=2110.11946
 |bibcode=2021A&A...656A.119L
 |s2cid=239616465}}</ref> Both [[WASP-33b]] and [[WASP-76b]] are [[ultra-hot Jupiters]] and it is likely that any water in their atmospheres is present as dissociated ions.