SWS spectroscopy of small grain features across the M17-Southwest photodissociation front.
Falgarone, E.; Wright, C. M.; Drapatz, S.; Puget, J. L.; Verstraete, L.; Timmermann, R.
Abstract
We present SWS spectra taken across the M17-Southwest photodissociation front and discuss spectral properties of PAHs and VSGs. We report new features at 4.65, 6.35, 8.7 and 11μm which we interpret as PAHs and/or VSGs emission. From feature intensity ratios along the cut, we find PAHs are mainly ionized and almost fully hydrogenated.