A survey of PAH emission in HII regions, planetary and proto-planetary nebulae

Details A survey of PAH emission in HII regions, planetary and proto-planetary nebulae A survey of PAH emission in HII regions, planetary and proto-planetary nebulae

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..358j&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 358-362 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

Cyclic Hydrocarbons, Emission Spectra, H Ii Regions, Infrared Spectroscopy, Planetary Nebulae, Protoplanets, Astronomical Spectroscopy, Carbon, Infrared Astronomy Satellite, Interstellar Matter, Molecules, Spectral Resolution, Stellar Composition

Scientific paper

The results of a systematic investigation of Polycyclic Aromatic Hydrocarbons (PAHs) emission in HII, planetary nebulae and proto-planetary nebulae, are reported. Data is obtained from the low resolution spectra of the Infrared Astronomy Satellite. The results show that: PAHs are formed in carbon rich evolved objects; PAHs emission is ubiquitous in general interstellar medium and requires the presence of ultraviolet photons, in planetary and proto-planetary nebulae, PAHs emission is seen only where an ionizing flux is present and in carbon rich objects.

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