Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231..887m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, April 1, 1988, p. 887-895.
Astronomy and Astrophysics
Astronomy
20
Far Infrared Radiation, H Ii Regions, Hydroxyl Emission, Interstellar Masers, Late Stars, Correlation, Electron Density (Concentration), Infrared Astronomy Satellite, Photodissociation, Star Formation
Scientific paper
Examination of the IRAS data for Type I OH/H II region maser sources in the galactic plane shows that a correlation exists between OH 1665 MHz peak flux density and far-infrared flux density. The form of the correlation suggests that a minimum far-infrared flux density is required for a given OH maser strength. This can be interpreted as evidence for pumping by far-infrared photons with a maximum efficiency in the IRAS 60 μm band of about 10 per cent. An alternative, but less plausible, possibility is that the OH and infrared emissions depend separately on the strength of the radiation field in the photodissociation zones close to compact H II regions.
Cohen Richard J.
Moore Justin Tatch
Mountain Charles M.
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