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Hbv475 - Evolution Stage of a Planetary Nebula?

NATIONAL RESEARCH COUNCIL OF CANADA. ASTROPHYSICS BRANCH.National Research Council of Canada. Dominion Observatories Branch

出版	National Research Council Of Canada. Astrophysics Branch
URL	http://books.google.com.hk/books?id=NA_xNwAACAAJ&hl=&source=gbs_api

註釋

Preliminary analysis of recent spectroscopic observations of HBV 475 suggests that a Wolf-Rayet star may be exciting a small nebula of rather high density (N sub e> 1,000,000/cc). It is also suggested that the forbidden lines are formed in several condensations of matter moving away from the central star with velocities of up to 250 km/sec. A new planetary nebula could be the result. (Author).