Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..527e&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 184, Aug. 1978, p. 527-535. Research supported by the Science Research
Astronomy and Astrophysics
Astronomy
19
Astronomical Spectroscopy, Emission Spectra, Fabry-Perot Spectrometers, Nebulae, H Alpha Line, H Ii Regions, Ionized Gases, Kinetic Energy, Radio Emission, Spectral Resolution, Stellar Winds
Scientific paper
An insect-eye Fabry-Perot spectrograph, combined with the 3.8-m Anglo-Australian telescope, has been used to obtain the profiles of the forbidden N II and O III emission lines at many positions over the H II region M17. Many unusual motions have been revealed. Also the motions in the high- and low-excitation gas have been shown to be similar. This substantiates a model for this object in which successive, partial, H I, Mol/H II shells expand (or contract) from (or to) the exciting stars. The source of energy for an expanding situation could be the stellar winds from embedded early-type stars.
Elliott K. H.
Meaburn John
Terrett David L.
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