Astrophysics and Space Science

, Volume 13, Issue 1, pp 110–127 | Cite as

Observations of high velocities inHii regions with a two-etalon Fabry-Pérot spectrometer

  • J. Meaburn
Article

Abstract

High internal motions of the ionized material in theHii regions M 8, M16, M 17 and the Orion Nebula were searched for with a two-etalon Fabry-Perot monochromotor. The profiles of the [Oiii], 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.

Keywords

High Velocity Radial Velocity Small Component Internal Motion Line Doubling 

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Copyright information

© D. Reidel Publishing Company 1971

Authors and Affiliations

  • J. Meaburn
    • 1
  1. 1.Dept. of AstronomyUniversity of ManchesterEngland

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