Far-infrared and CO observations of the W33 complex

Details Far-infrared and CO observations of the W33 complex Far-infrared and CO observations of the W33 complex

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...283..573s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 15, 1984, p. 573-579.

Astronomy and Astrophysics

Astronomy

17

Carbon Monoxide, Infrared Spectra, Infrared Stars, Molecular Clouds, Radio Sources (Astronomy), Astronomical Maps, Far Infrared Radiation, H Ii Regions, Interstellar Masers, Stellar Luminosity

Scientific paper

The authors present multi-band far-infrared (20 - 250 μm) and CO observations of the giant H II region W33. At a resolution of ≡1arcmin, they resolve the complex into four distinct far-infrared (far-IR) sources, derive their color temperatures and optical depths, and examine their relationship to the molecular and radio continuum properties. Most of the W33 radio continuum features observed at 3.5 cm have far-IR counterparts. The northern source (W33 A) has a high far-IR luminosity (≡105L_sun;) but is undetectable in the radio continuum. This source is either a normal ZAMS O7 star with an optically thick H II region of density 105 - 106cm-3 or a 30 - 50 M_sun; protostar in its gravitational contraction stage.

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