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arXiv 0905.0438astro-ph.GA
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分子气体与银河系超新星遗迹G5 .4-1.2,G5 .55+0.32和G5 .71-0.08相互作用的CO J=1-0观测

CO J=1-0 observations of molecular gas interacting with galactic supernova remnants G5.4-1.2, G5.55+0.32 and G5.71-0.08

H. S. Liszt

摘要:

银河系超新星遗迹W 28(l=6.4 \degr,b=-0.2 \degr)以西的区域,有5个新发现的1720 OH脉泽斑中的3个和两个最近发现的候选超新星(其中一个是$γ$射线源),以及几个致密的经典HII区。在这里,我们分析了一个数据立方体的CO J=1-0发射具有1 \arcmin和1 \kms分辨率,在该地区的即时映射$5\degr \le l \le 6\degr, -1\degr \le b \le 0.5\degr$ }。在1720 MHz OH脉泽的速度下和在缺少脉泽的超新星遗迹G5.55+0.32周围探测到了扩展的、通常非常明亮的CO发射。在G5.55+0.32的外围检测到一个新的双极外流,它在1 \arcmin分辨率下勉强分辨,在CO(12 K)中很强,与MSX源一致;在射电遗迹的外围之外还有一个明亮的CO边缘。在G5.71-0.08附近的OH脉泽位于强发射分子气体(高达20 K)的壳层上。在G5.4-1.2的-21 \kms速度下,CO覆盖了大部分场,但在残余物附近较弱(3 K)且未受干扰。首次给出了G5.89-0.39(W28 A2)中致密H Ⅱ区和外流区周围的扩展分子气体。

英文摘要:

The field just West of the galactic supernova remnant W28 (l=6.4\degr, b=-0.2\degr) harbors 3 of 5 newly-discovered 1720 OH maser spots and two recently-discovered candidate supernova candidates (one of which is a $γ$-ray source), as well as several compact and classical HII regions. Here, we analyze a datacube of CO J=1-0 emission having 1\arcmin and 1 \kms resolution, made with on-the-fly mapping over the region $5\degr \le l \le 6\degr, -1\degr \le b \le 0.5\degr$}. {Extended and often very bright CO emission was detected at the velocities of the 1720 MHz OH masers and around the supernova remnant G5.55+0.32 which lacks a maser. A new bipolar outflow which is marginally resolved at 1\arcmin resolution and strong in CO (12K) was detected at the periphery of G5.55+0.32, coincident with an MSX source; there is also a bright rim of CO just beyond the periphery of the radio remnant. The OH maser near G5.71-0.08 lies on a shell of strongly-emitting molecular gas (up to 20K) . At the -21 \kms velocity of G5.4-1.2, CO covers much of the field but is weak (3 K) and undisturbed near the remnant. The extended molecular gas around the compact H II region and outflow in G5.89-0.39 (W28A2) is shown for the first time.}

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