Fine-Structure Line Contribution to IRAS Bands in the Rosette Nebula

Details Fine-Structure Line Contribution to IRAS Bands in the Rosette Nebula Fine-Structure Line Contribution to IRAS Bands in the Rosette Nebula

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...469l.131s&link_type=abstract

Astrophysical Journal Letters v.469, p.L131

Astronomy and Astrophysics

Astronomy

3

Infrared: Ism: Lines And Bands, Ism: H Ii Regions, Ism: Individual Name: Rosette Nebula

Scientific paper

The possibility of significant line emission contributing to the 12, 25, 60, and 100 mu m infrared emission is explored for the Rosette H II region. We find that the [O III] fine-structure lines in the far-infrared contribute significantly (25%--40%) at both 60 and 100 mu m. All of the 12 mu m emission is consistent with emission from [S IV] and other lines. The [O IV] line can explain the 25 mu m emission near the central cavity but is unable to explain the strength of the 25 mu m emission at more distant lines of sight. Based on the strength of the 25 mu m emission and the high 60/100 ratio, we conclude that a hot dust component within the H II region is necessary and that the best candidate for this component is "astronomical" iron.

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