Other
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aj.....83..241r&link_type=abstract
Astronomical Journal, vol. 83, Mar. 1978, p. 241-243.
Other
16
Interstellar Extinction, Interstellar Matter, Carbon Monoxide, Star Distribution
Scientific paper
General star counts from eight fields in Scorpio and Ophiuchus are used to derive the large-scale distribution of extinction over an area of approximately 380 sq deg in the two constellations. The derived extinctions are presented as a composite contour map of the photographic extinctions in the eight fields. It is found that several dark cloud complexes are embedded in an extensive region of low obscuration, that the diffuse background permeates most of the area studied and extends to more than 70 pc above the galactic plane, and that the major features in the complexes are generally elongated, inclined to the galactic plane by about 30 deg, and oriented roughly parallel to each other. Evidence is cited for a characteristic spacing of approximately 1.5 deg of arc between the clouds in each complex as well as for a possible physical association among the complexes. It is concluded that if the complexes are physically associated, a four-level hierarchy of fragmentation, consisting of supercomplexes, complexes, clouds, and subclouds, can be identified in the examined region.
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