Re-identification of G35.6−0.4 as a supernova remnant |
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Authors: | D. A. Green |
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Affiliation: | Astrophysics Group, Cavendish Laboratory, 19 J. J. Thomson Avenue, Cambridge CB3 0HE |
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Abstract: | G35.6−0.4 is an extended radio source in the Galactic plane which has previously been identified as either a supernova remnant or an H ii region. Observations from the Very Large Array Galactic Plane Survey at 1.4 GHz with a resolution of 1 arcmin allow the extent of G35.6−0.4 to be defined for the first time. Comparison with other radio survey observations show that this source has a non-thermal spectral index, with S ∝ν−0.47±0.07 . G35.6−0.4 does not have obvious associated infrared emission, so it is identified as a Galactic supernova remnant, not an H ii region. It is ≈15 × 11 arcmin2 in extent, showing partial limb brightening. |
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Keywords: | ISM: individual: G35.6−0.4 supernova remnants radio continuum: ISM |
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