A reexamination of the Gum nebula |
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Authors: | Klaus P Beuermann |
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Institution: | (1) Institut für Reine und Angewandte Kernphysik, Universität Kiel, Germany |
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Abstract: | A detailed analysis of interstellar measurements in the direction of the Gum nebula is carried out. The ionized region is shown to have an angular radius of 18° and appears to be bounded by a shell of neutral gas. The mean electron temperature deduced from radio-frequency absorption measurements is found to be 8500K. These parameters suggest that the nebula is the normal and possibly evolved Hii region of Pup and 2 Vel, rather than the fossil Strömgren sphere of the Vela supernova as suggested by Brandtet al. (1971). |
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