New PAH mode at 16.4 microns

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dc.creatorMoutou, C.
dc.creatorVerstraete, L.
dc.creatorLeger, A.
dc.creatorSellgren, K.
dc.creatorSchmidt, W.
dc.date1999-12-30
dc.date.accessioned2026-07-25T13:52:53Z
dc.descriptionThe detection of a new 16.4 micron emission feature in the ISO-SWS spectra of NGC 7023, M17, and the Orion Bar is reported. Previous laboratory experiments measured a mode near this wavelength in spectra of PAHs (Polycyclic Aromatic Hydrocarbons), and so we suggest the new interstellar 16.4 micron feature could be assigned to low-frequency vibrations of PAHs. The best carrier candidates seem to be PAH molecules containing pentagonal rings.
dc.identifierhttps://arxiv.org/abs/astro-ph/9912559
dc.identifierhttp://arxiv.org/abs/astro-ph/9912559
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/21147
dc.subjectAstrophysics
dc.titleNew PAH mode at 16.4 microns
dc.typetext

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