Observations of High Velocities in H II Regions with a Two-Etalon Fabry-Pérot Spectrometer

Details Observations of High Velocities in H II Regions with a Two-Etalon Fabry-Pérot Spectrometer Observations of High Velocities in H II Regions with a Two-Etalon Fabry-Pérot Spectrometer

Sep 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971ap%26ss..13..110m&link_type=abstract

Astrophysics and Space Science, Volume 13, Issue 1, pp.110-127

Astronomy and Astrophysics

Astrophysics

43

Scientific paper

High internal motions of the ionized material in the Hii regions M 8, M16, M 17 and the Orion Nebula were searched for with a two-etalon Fabry-Perot monochromotor. The profiles of the [O iii], 5007 Å and in one case the 4959 Å line were obtained at many positions from these nebulae. Non-gaussian wings of up to -60 km/s were found on the profiles from M 17 and M 16 over regions several minutes across. Line doubling of up to 20 km/s was definitely found in M17 and M 8. Small components with radial velocities of up to -55 km/s with respect to the means were suspected in M 8 and the Orion Nebula.

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