Unusual, Large-Scale, Motions in HII Regions

  • J. Meaburn
Part of the Astrophysics and Space Science Library book series (ASSL, volume 70)


In many HII regions, huge volumes of ionized gas emit split lines. Such splitting occurs exclusively over dark areas surrounded by bright rims; these rims, which are produced by ionization fronts eating into the adjacent neutral masses, emit single lines centred on the mean motion of the nebular complex. Detailed observations of this situation are presented for the Orion (M42), Carina, Omega (M17), and 30 Doradus Nebulae. In the latter, Ca+ H and K absorption-line velocities suggest that a HI/HII shell is collapsing toward the central ionizing stars.


Radial Velocity Optical Line Line Splitting Large Magellanic Cloud Ionization Front 
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  1. Deharveng, L.: 1973, Astron. Astrophys. 29, 341.ADSGoogle Scholar
  2. Deharveng, L. and Maucherat, M.: 1975, Astron. Astrophys. 41, 27.ADSGoogle Scholar
  3. Dickel, H.R.: 1974, Astron. Astrophys. 31, 11ADSGoogle Scholar
  4. Dopita, M.A., Isobe, S. and Meaburn, J.: 1975, Astrophys. Space Sci. 28, 61.ADSCrossRefGoogle Scholar
  5. Elliott, K.H. and Meaburn, J.: 1973, Astron. Astrophys. 27, 367.ADSGoogle Scholar
  6. Elliott, K.H. and Meaburn, J.: 1974, Astrophys. Space Sci. 34, 473.Google Scholar
  7. Elliott, K.H. and Meaburn, J.: 1975, Astrophys. Space Sci. 35, 81.Google Scholar
  8. Elliott, K.H., Goudis, C., Meaburn, J. and Tebbutt, N.J.: 1976, Astron. Astrophys. (in press).Google Scholar
  9. Feast, M.W.: 1961, M.N.R.A.S. 122, 1.ADSGoogle Scholar
  10. Goudis, C. and Meaburn, J.: 1976, Astron. Astrophys. 51, 401.ADSGoogle Scholar
  11. Huchtmeier, W.K., Day, G.A.: 1975, Astron. Astrophys. 41, 153.ADSGoogle Scholar
  12. McGee, R.X. and Milton, J.A.: 1966, Aust. J. Phys. 191, 343.ADSGoogle Scholar
  13. Meaburn, J.: 1975, “HII Regions and Related Topics” (Springer-Verlag) 222.CrossRefGoogle Scholar
  14. Meaburn, J.: 1977, Astrophys. Space Sci. (in press).Google Scholar
  15. Schmidt-Kaler, Th. and Isserstedt, J.: 1976, Astrophys. Space Sci. 41, 139ADSCrossRefGoogle Scholar
  16. Smith, M.G. and Weedman, D.W.: 1972, Astrophys. J. 172 307.ADSCrossRefGoogle Scholar
  17. Thaddeus, P., Wilson, R.W., Kutner, M., Penzias, A.A. and Jefferts, K.B. 1971, Astrophys. J. Letts. l68, 59.ADSCrossRefGoogle Scholar
  18. Walborn, N.R. and Hesser, J.E.: 1975, Astrophys. J. 199, 535.ADSCrossRefGoogle Scholar
  19. Wilson, O.C., Münch, G., Fiather, E.M. and Coffeen, M.F.: 1959, Astrophys. J. Suppl. 4 199.ADSCrossRefGoogle Scholar
  20. Wilson, W.J., Schwarz, P.R., Epstein, E.E., Johnson, W.A., Etcheverry, R.D., Mori, T.T., Berry, G.G. and Dyson, H.B.: 1974, Astrophys. J. 191, 357.ADSCrossRefGoogle Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1977

Authors and Affiliations

  • J. Meaburn
    • 1
  1. 1.Department of AstronomyThe UniversityManchesterEngland

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