The W 51 source complex

  • J. Bieging
Part VI: Selected Galactic H II Regions
Part of the Lecture Notes in Physics book series (LNP, volume 42)


Recent observational results for the giant H II complex W 51 are reviewed. The radio continuum emission is produced by two types of component; a diffuse, very extended ionized gas with low emission measure; and a number of compact sources with high emission measures and electron densities. The compact components are associated with near-infrared sources and with massive molecular clouds, the densities of which range from \(n_{H_2 }\) ∼ 103 cm-3 to 105 cm-3. Some of the molecular clouds in the W51 complex may be part of a gas stream flowing along the Sagittarius spiral arm.


Emission Measure Molecular Cloud Recombination Line Source Complex Compact Source 


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • J. Bieging
    • 1
  1. 1.Max-Planck-Institut für RadioastronomieBonnFRG

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