Far-infrared (120-300 micron) observations of southern H II regions

Details Far-infrared (120-300 micron) observations of southern H II regions Far-infrared (120-300 micron) observations of southern H II regions

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apjs...69..233g&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 69, Feb. 1989, p. 233-239.

Astronomy and Astrophysics

Astronomy

17

Astronomical Photometry, Far Infrared Radiation, H Ii Regions, Infrared Sources (Astronomy), Nebulae, Angular Resolution, Early Stars, Interstellar Matter, Main Sequence Stars, Stellar Luminosity

Scientific paper

Observations of three southern H II regions, namely RCW 57, RCW 108, and RCW 122, in a 120-300 micron wavelength band are presented. The intensity maps, covering an area greater than 15 x 20 arcmin with an angular resolution of about 1 arcmin, are presented for each source and compared with the observations in other bands to draw conclusions on temperatures, luminosities, optical depths, and the dust emissivity law. It is found that the IR luminosity of these sources can be explained as being due to zero-age-main-sequence early-type stars energizing the clouds. The wavelength dependence of the emissivity for the submillimeter-emitting dust, in RCW 57 and RCW 122, is found to be substantially flatter than that usually found for H II regions.

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