Galactic ring nebulae associated with Wolf-Rayet stars. IV. The ring nebula S308 and its interstellar environment

Journal Article · Mon Mar 15 04:00:00 EST 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159766· OSTI ID:5169469

Chu, Y; Gull, T R; Treffers, R R; Kwitter, K B; Troland, T H

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/sup -1/ and an age of 7 x 10/sup 4/ 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.

• Research Organization: Astronomy Department, University of California, Berkeley
• OSTI ID: 5169469
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 254:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED PARTICLES
COSMIC RADIO SOURCES
EMISSION SPECTRA
H2 REGIONS
IONS
MAIN SEQUENCE STARS
MEASURING INSTRUMENTS
NEBULAE
OXYGEN IONS
PHOTOGRAPHY
SPECTRA
SPECTROMETERS
STARS
STELLAR WINDS
WOLF-RAYET STARS