Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..578c&link_type=abstract
Astrophysical Journal, Part 1, vol. 254, Mar. 15, 1982, p. 578-586.
Astronomy and Astrophysics
Astrophysics
72
Hydrogen Clouds, Interstellar Gas, Nebulae, Ring Structures, Stellar Winds, Wolf-Rayet Stars, Fabry-Perot Spectrometers, Galactic Structure, H Alpha Line, Spectral Line Width, Stellar Mass Ejection
Scientific paper
Narrow-band interference filter photographs and high resolution Fabry-Perot spectra have been obtained for four galactic ring nebulae associated with Wolf-Rayet stars - NGC 3199, anon (MR 26), RCW 58, and RCW 104. All of these four nebulae show interaction between the stellar wind and the ambient interstellar medium. NGC 3199, anon (MR 26), and RCW 104 are classified as W-type nebulae. RCW 58, having a prominent ring of stellar ejecta, is classified as an E-type nebula. For most W-type nebulae, the kinetic energy in the shell is only about 1 percent of the total mechanical energy input from the stellar wind, while the ratio of the shell momentum to the total momentum injected by the stellar wind is about 0.5 and apparently increases with the nebular age.
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