G213.0−0.6, a true supernova remnant or just an H ii region?
X Y Gao,
C J Wu,
X H Sun
et al.
Abstract:G213.0−0.6 is a faint extended source situated in the anticentre region of the Galactic plane. It has been classified as a shell-type supernova remnant (SNR) based on its shell-like morphology, steep radio continuum spectrum, and high ratio of [S ii]/Hα. With new optical emission line data of Hα, [S ii], and [N ii] recently observed by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the ratios of [S ii]/Hα and [N ii]/Hα are re-assessed. The lower values than those previously reported put G213.0−… Show more
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