新发现及候选银河超新星遗迹的光学发现，以及麒麟圈超新星遗迹的光学成像

本文报告了利用业余级设备通过超过1500小时的Hα和[O III]成像，发现了一批新的及候选银河超新星遗迹。研究展示了这些遗迹的光学光谱特征及丝状形态，并提供了麒麟圈超新星遗迹及其周边区域的高分辨率光学图像。

arXiv:2608.26666v1 Announce Type: new Abstract: We report the discovery of new and candidate Galactic supernova remnants made through over 1500 hours of H$\alpha$ and [O III] imaging using amateur class instrumentation. These nebulae range from 1 to over 8 degrees in size. Five of these, namely G27.8-17.1, G115.6+9.2, G190.5+25.3, G195.9+2.2 and G239.9+7.0 exhibit low-dispersion optical spectra indicating shock emission by the presence of strong [S II] $\lambda\lambda$6716,6731 and [O I] $\lambda$6300 line emissions relative to H$\alpha$, or exhibit a nonradiative shock generated Balmer dominated spectrum. Their filamentary emission morphology also supports the presence of interstellar shock fronts. Two other optical nebulae, G191.3+11.1 and G205.7-1.7, appear likely to be remnants and are proposed as new SNR candidates. We also present [O III] and H$\alpha$ images of optical filaments associated with the 25 degree diameter Monogem Ring SNR which reveal extensive emission-line filaments around most of the remnant's X-ray boundaries. Deep images of the large and [O III] emission dominated SNR G206.6+6.1 seen toward Monogem SNR's center are also included. Key findings of this work include: 1) optical surveys can sometimes detect SNRs especially at high Galactic latitudes and toward the Galactic anti-center direction better than radio and X-ray SNR searches, 2)