Published March 15, 1982
| Version v1
Journal article
Galactic ring nebulae associated with Wolf-Rayet stars. IV. The ring nebula S308 and its interstellar environment
- 1. Astronomy Department, University of California, Berkeley
Description
We have obtained narrwo-band filter photographs, [O III] lambda5007 Fabry-Perot line profiles and 21 cm maps of the cicinity of the Sharpless H II region S308 and adjacent nebulae. S308 is a ring nebula surrounding the WN5 star HD 50896. An expansion velocity of 60 km s-1 and an age of 7 x 104 years are derived for S308. The total kinetic energy and thermal energy in the shell of S308 can account for only 5% 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
Additional details
Publishing Information
- Journal Title
- Astrophys. J.
- Journal Volume
- 254
- Journal Issue
- 2
- Series
- Astrophys. J.
- Journal Page Range
- 562-568
- ISSN
- 0004-637X
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14722310
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- EMISSION SPECTRA; H2 REGIONS; NEBULAE; OXYGEN IONS; PHOTOGRAPHY; SPECTROMETERS; STELLAR WINDS; WOLF-RAYET STARS
- Descriptors DEC
- CHARGED PARTICLES; COSMIC RADIO SOURCES; IONS; MAIN SEQUENCE STARS; MEASURING INSTRUMENTS; SPECTRA; STARS