Deep forbidden O III interference filter imagery of the supernova remnants G65.3+5.7, G126.2+1.6, CTA 1, and VRO 42.05.01

Astronomy and Astrophysics – Astronomy

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Astronomical Photography, Nebulae, Supernova Remnants, Light Emission, Nonthermal Radiation, Oxygen, Photographic Plates, Photographs, Radio Sources (Astronomy)

Scientific paper

Deep forbidden O III images of four galactic supernova remnants are presented and discussed. These photographs show greater detail in the optical structures of the remnants G65.3+5.7 and CTA 1 than previously available and reveal new emission features within the remnants G126.2+1.6 and VRO 42.05.01. The photographs demonstrate the usefulness of imaging in forbidden O III for detecting the presence of optical emission from some supernova remnants. They also indicate substantial spatial and morphological differences between bright H-alpha + forbidden N II and forbidden O III emitting filaments in some of these remnants. No optical nebulosity was found to be associated with the suspected nonthermal radio source CTB 13.

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