Loved the title *and* the paper!
If you wait until the last minute, it only takes a minute, right?
Aside from telling us more about PAH chemistry, the strength of this feature and its variations in the ISM may shed light on why the D/H ratio is so surprisingly variable in the Galaxy. 2/2 ui.adsabs.harvard.edu/abs/2006ApJ....
PAH features associated with attached H atoms have longer wavelength counterparts when deuterium is subbed for H. JWST just found one at 4.65um in what looks like a serendipitous detection in a molecular outflow spectrum. 1/2 arxiv.org/abs/2309.06486
One of the many notable things about this spectrum is that it includes the shortest (3.3 micron) and longest (17 micron) known PAH features. Made possible by the broad wavelength coverage of JWST.
An embarrassment of riches indeed! Gorgeous spectrum of the Orion Bar with prominent emission from hydrocarbon molecules as seen by JWST. Kudos to the PDRs4All team! 🔭 arxiv.org/abs/2308.16733