Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apjs...77..451l&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 77, Dec. 1991, p. 451-471. Research supported by SERC.
Astronomy and Astrophysics
Astronomy
8
B Stars, Infrared Sources (Astronomy), O Stars, Open Clusters, Stellar Models, Early Stars, H Ii Regions, Interstellar Matter, Star Clusters
Scientific paper
A model for the infrared emission from the neighborhood of an OB star cluster is described. The distribution of gas and dust around the stars, properties of the dust, and the cluster and interstellar radiation fields are variable. The model can be applied to regions around clusters embedded to various degrees in their parental molecular clouds (i.e., compact H II regions, blister-type H II regions, and the tenuous H II regions ionized by naked O stars). The model is used to simulate IRAS observations of a typical blister H II region. Infrared surface brightness and spectral energy distributions are predicted and the impact of limited spatial resolution is illustrated. The model results are shown to be consistent with observations of the exemplary outer Galaxy OB cluster NGC 7380. It is planned to use the model as a diagnostic tool to probe the physical conditions and dust properties in star-formation regions and, ultimately, in an interpretation of the spectral energy distributions of spiral galaxies.
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