新的及候选银星系超新星遗迹的光学发现，兼及 Monogem 环超新星遗迹的光学成像
Optical Discovery of New and Candidate Galactic Supernova Remnants Plus Optical Imaging of the Monogem Supernova Remnant
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中文总结 AI 辅助
本研究利用业余级仪器经1500余小时光学成像发现5个新银星系超新星遗迹、2个候选遗迹，补充了Monogem环遗迹的成像，还得出光学巡天在特定区域探测SNR更具优势等3项关键结论。
中文摘要 AI 辅助
我们报告了通过业余级仪器开展的超过1500小时的Hα和[O III]成像观测所发现的新的及候选银星系超新星遗迹（SNR）。这些星云的大小从1度到超过8度不等。其中5个天体，即G27.8-17.1、G115.6+9.2、G190.5+25.3、G195.9+2.2和G239.9+7.0，其低色散光学光谱显示出激波发射特征，表现为相对于Hα的强[S II] λλ6716、6731和[O I] λ6300谱线发射，或呈现以巴尔末线为主的非辐射激波光谱；它们的纤维状发射形态也支持存在星际激波前。另外两个光学星云G191.3+11.1和G205.7-1.7看起来很可能是超新星遗迹，被提议作为新的SNR候选体。我们还展示了与直径25度的Monogem环SNR相关的光学纤维的[O III]和Hα图像，这些图像揭示了该遗迹X射线边界周围存在广泛的发射线纤维。本工作还包含了对朝向Monogem SNR中心的大型、以[O III]发射为主的SNR G206.6+6.1的深场图像。本工作的关键发现包括：1）光学巡天有时能比射电和X射线SNR巡天更好地探测到SNR，尤其是在高银纬和银心反方向区域；2）巴尔末非辐射激波在高银纬SNR中似乎并不罕见；3）以[O III]发射为主的暗弱SNR可能在Hα发射巡天中被遗漏了。
英文摘要
We report the discovery of new and candidate Galactic supernova remnants made through over 2000 hours of H$α$ and [O III] imaging using amateur class instrumentation. These nebulae range from 0.5 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] $λλ$6716,6731 and [O I] $λ$6300 line emissions relative to H$α$, or exhibit a nonradiative shock generated Balmer dominated spectrum. Their filamentary emission morphology also supports the presence of interstellar shock fronts. Three other optical nebulae, G191.3+11.1, G205.7-1.7, and G305.4-0.7 appear likely to be remnants and are proposed as new SNR candidates. We also present [O III] and H$α$ 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 X-ray suspected remnant G190.4+12.5 and the large and [O III] emission dominated SNR G206.6+6.1 seen toward or near the Monogem SNR are also included. Key findings of this work include: 1) optical surveys can sometimes detect SNRs better than radio and X-ray SNR searches, 2) Balmer nonradiative shocks appear not uncommon in high Galactic latitude SNRs, and 3) faint \O3 emission dominated SNRs may have been missed in prior H$α$ emission only surveys.
发表机构
- Dartmouth College（达特茅斯学院）
- Sierra Remote Observatories（塞拉远程天文台）
- Starfront Observatories（星前线天文台）
- The Deep Sky Collective（深空集体）
- Kitt Peak National Observatory（基特峰国家天文台）
- Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理学研究所）
- Max-Planck-Institut für Radioastronomie（马克斯·普朗克射电天文学研究所）
机构由 AI 辅助整理，请以论文原文为准。
