Observations of High Velocities in H II Regions

Details Observations of High Velocities in H II Regions Observations of High Velocities in H II Regions

Dec 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.228.1069m&link_type=abstract

Nature, Volume 228, Issue 5276, pp. 1069-1070 (1970).

Computer Science

11

Scientific paper

SEVERAL investigators using a variety of optical instruments have indicated that small components of the ionized matter in H II regions are in a highly turbulent state1-5. In particular, Shcheglov3, using a photographic, single etalon Fabry-Perot at Hα in a non-classical combination with a telescope, found small components with turbulence of up to 100 km s-1 in M17 (NGC 6618), M8 (NGC 6523), the Orion nebula (NGC 1976) and M16 (NGC 6611). With this instrument he effectively took photographs at three adjacent positions in wavelength through a tunable 0.7 Å filter of the whole of these nebulae. They changed shape at different wavelengths though this was only apparent with widely varying exposure times.

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