Radio recombination lines from the supernova remnant candidate G339.2-0.4

Astronomy and Astrophysics – Astronomy

Scientific paper

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Line Spectra, Radiative Recombination, Radio Sources (Astronomy), Supernova Remnants, Abundance, Electron Energy, H Ii Regions, Heavy Elements, Pulsars, Radio Telescopes

Scientific paper

Both the H109-alpha and H137-beta recombination lines have been clearly detected from the direction of the supernova remnant G339.2-0.4. The source appears to be a low-excitation H II region with an electron temperature of approximately 5000 K and a considerable overabundance of heavy elements. An analysis of the observations provides conclusive evidence that G339.2-0.4 is not a supernova remnant.

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