Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....83...79g&link_type=abstract
Astronomy and Astrophysics, vol. 83, no. 1-2, Mar. 1980, p. 79-85. Research sponsored by the Science Research Council.
Astronomy and Astrophysics
Astronomy
8
H Alpha Line, Hydrogen Clouds, Interstellar Extinction, Microwave Spectra, Electrophotometry, High Resolution, Radio Astronomy
Scientific paper
The obscuration of light caused by the presence of dust along the W3/W4/W5 region has been investigated by comparing optical (H-alpha) and radio data of the same angular resolution. W3 was studied at relatively high resolution (2.8 arc min), and the distribution of the visual extinction over the object has been established. The W3/W4 and W5 complexes were investigated at a moderate angular resolution (8.9 arc min) and contour maps of the visual extinction over the area have been constructed. The dust enveloping the W3/W4 complex appears to be concentrated in condensations, often coinciding with the CO molecular condensations discovered in the same area. These are often associated with H II knots and are likely sites for the formation of stars (a process that has already occurred in W3). This view is further strengthened from the fragmented structure of the obscuring cloud of W5 and the close association of the dust fragments with the CO condensations and the newly formed stars (IR objects, etc.) embedded within them.
Goudis Ch.
White Neil J.
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