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arXiv 0909.2959astro-ph.GA
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银河系超新星遗迹G85 .9-0.6的光学成像和光谱观测

Optical Imaging and Spectroscopic Observation of the Galactic Supernova Remnant G85.9-0.6

F. Gok, A. Sezer, E. Aktekin, T. Guver, N. Ercan

摘要:

首次对银河系超新星遗迹G85.9-0.6进行了H-$α$和[SII]滤光片的光学CCD成像和光谱观测。CCD图像数据是由TUBITAK国家天文台(TUG)的1.5米俄罗斯-土耳其望远镜(RTT 150)拍摄的,光谱数据是由亚利桑那州基特峰的博克2.3米望远镜拍摄的。这些图像是用窄带干涉滤光片H $α$ [SII]及其连续体拍摄的。[SII]/H $α$比率图像。从[SII]/H $α$得到的比值为$\sim$ 0.42,表明残基与HII区相互作用。G85.9-0.6显示扩散壳形态。[SII]从该光谱计算出$λλ6716/6731$平均通量比,得到电子密度$N_{e}$为395 $cm^{-3}$。根据[OIII]/H $β$比值,估算了激波速度,给出了$n_{c}=14$ $cm^{-3}$的激波前密度、$E=9.2\times10^{50}$尔格的爆炸能量、$E(B-V)=0.28$的星际消光和$N(HI)=1.53\times10^{21}$ $cm^{-2}$的中性氢柱密度。

英文摘要:

Optical CCD imaging with H$α$ and [SII] filters and spectroscopic observations of the galactic supernova remnant G85.9-0.6 have been performed for the first time. The CCD image data are taken with the 1.5m Russian-Turkish Telescope (RTT150) at TUBITAK National Observatory (TUG) and spectral data are taken with the Bok 2.3 m telescope on Kitt Peak, AZ. The images are taken with narrow-band interference filters H$α$, [SII] and their continuum. [SII]/H$α$ ratio image is performed. The ratio obtained from [SII]/H$α$ is found to be $\sim$0.42, indicating that the remnant interacts with HII regions. G85.9-0.6 shows diffuse-shell morphology. [SII]$λλ6716/6731$ average flux ratio is calculated from the spectra, and the electron density $N_{e}$ is obtained to be 395 $cm^{-3}$. From [OIII]/H$β$ ratio, shock velocity has been estimated, pre-shock density of $n_{c}=14$ $cm^{-3}$, explosion energy of $E=9.2\times10^{50}$ ergs, interstellar extinction of $E(B-V)=0.28$, and neutral hydrogen column density of $N(HI)=1.53\times10^{21}$ $cm^{-2}$ are reported.

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