G339.2-0.4 - Supernova remnant, or planetary nebula

Details G339.2-0.4 - Supernova remnant, or planetary nebula G339.2-0.4 - Supernova remnant, or planetary nebula

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..459m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 189, Nov. 1979, p. 459-463.

Astronomy and Astrophysics

Astronomy

4

Astronomical Spectroscopy, Optical Emission Spectroscopy, Planetary Nebulae, Radio Sources (Astronomy), Supernova Remnants, Astronomical Maps, Astronomical Photography, Oxygen Spectra, Radio Spectra, Spectrum Analysis

Scientific paper

The radio and optical properties of G339.2-0.4, which has been classified as a supernova remnant and as a low-excitation planetary nebula, are investigated in an attempt to determine the true nature of the object. A radio map of the source at 1420 MHz is examined, along with the source's 408- and 5000-MHz flux densities, several optical surveys, and an optical spectrum from 4600 to 7600 A. The results indicate that the radio spectrum has a power-law index of -0.2, that the mean observed radio flux density is high - and the emission measure low - for a planetary nebula, and that the overall optical spectrum is most like that of a low-excitation planetary nebula. It is concluded that the nature of G339.2-0.4 remains uncertain.

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