On the nature of G25.5 + 0.2 - The IRAS low-resolution spectrum of IRAS 18344 - 0632

Astronomy and Astrophysics – Astronomy

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Infrared Astronomy Satellite, Infrared Spectra, Radio Sources (Astronomy), Supernova Remnants, H Ii Regions, Milky Way Galaxy, Planetary Nebulae

Scientific paper

The IRAS low-resolution spectrum of IRAS 81344 - 0632, which may be associated with the proposed (Cowan et al., 1989) very young supernova remnant G25.5 + 0.2, is presented. This spectrum shows a red continuum, and the 12.8-micron Ne II forbidden line, and is similar to the spectra of known compact H II regions and planetary nebulae. This, together with other results, suggests that IRAS 18344 - 0632 and G25.5 + 0.2 are associated, and are a planetary nebula not a young supernova remnant, although it is difficult to reconcile this identification with all available observations.

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