SWS spectroscopy of small grain features across the M17-Southwest photodissociation front

Verstraete L., Puget J.L., Falgarone E., Drapatz S., Wright C.M., 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 11 mum 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.

Keywords:
Keywords: ISM: molecules - ISM: dust - ISM: molecular cloud, HII region

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