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- W2012572443 abstract "view Abstract Citations (49) References (33) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Galactic ring nebulae associated with Wolf-rayet stars. IV. The ring nebula S 308 and its interstellar environment. Chu, Y. H. ; Gull, T. R. ; Treffers, R. R. ; Kwitter, K. B. ; Troland, T. H. Abstract Narrow-band filter photographs, O III 5007 A Fabry-Perot forbidden line profiles, and 21-cm maps of the vicinity of the Sharpless H II region S308 and adjacent nebulae have been obtained. S308 is a ring nebula surrounding the WN5 star HD 50896. An expansion velocity of 60 km/sec, and an age of 70,000 years, are derived for S308. The total kinetic energy and thermal energy in the shell of S308 can account for only 5 percent of the total stellar wind energy input. The H II regions S303 and S304 exterior to S308 are also excited by the star HD 50896, showing that S308 is optically thin to UV photons. Publication: The Astrophysical Journal Pub Date: March 1982 DOI: 10.1086/159766 Bibcode: 1982ApJ...254..562C Keywords: Galactic Structure; Nebulae; Ring Structures; Spectral Line Width; Wolf-Rayet Stars; Fabry-Perot Spectrometers; Forbidden Transitions; H Ii Regions; H Lines; Interstellar Gas; Oxygen Spectra; Stellar Winds; Astrophysics full text sources ADS | data products SIMBAD (1) Related Materials (7) Part 1: 1981ApJ...249..195C Part 2: 1981ApJ...249..586C Part 3: 1981ApJ...250..615C Part 5: 1982ApJ...254..569T Part 6: 1982ApJ...254..578C Part 7: 1982ApJ...254..132T Part 8: 1983ApJS...53..937C" @default.
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- W2012572443 date "1982-03-01" @default.
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- W2012572443 title "Galactic ring nebulae associated with Wolf-Rayet stars. IV - The ring nebula S308 and its interstellar environment" @default.
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