Photometric study of the Orion OB 1 association. 3: subgroup analyses
Technical Report
·
OSTI ID:6844189
The four principal subgroups of the association were examined in detail using individual distances and reddening values determined for their B type members. Subgroup 1a appeared not to show a spread in age, nor did it show a systematic distance increase with right ascension when fainter members were considered. An eastwardly increase in distance was found for subgroub 1b, but the reddening law for the east Belt appeared normal. Small subclusterings in the vicinity of the Orion Nebula appeared not to differ in the evolutionary state, but their ages were considerably greater than those of stars in the nebulae and its associated cluster.
- Research Organization:
- National Aeronautics and Space Administration, Greenbelt, Md. (USA). Goddard Space Flight Center
- OSTI ID:
- 6844189
- Report Number(s):
- N-77-34062; NASA-TM-X-71407; X-680-77-251
- Country of Publication:
- United States
- Language:
- English
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