Intermittent maser flare around the high mass young stellar object G353.273+0.641 II. Detection of a radio and molecular jet
Intermittent maser flare around the high mass young stellar object G353.273+0.641 II. Detection of a radio and molecular jet
复制标题
高质量年轻恒星 G353.273 0.641 II 周围的间歇性脉泽耀斑。
DOI：
10.1093/mnras/sts035
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发表时间：
2013
影响因子：
4.8
通讯作者：
(+5名)
中科院分区：
文献类型：
--
作者：
Kazuhito Motogi;(+5名)
我们报告的第一次检测到的无线电连续和分子喷流与占主导地位的蓝移脉泽源，G353.273+0.641。射电喷流沿着西北-东南（NW-SE）方向延伸3000 Au。在双极射电喷流的根部发现了H_2O脉泽。用SiO（= 0，J= 2-1）热发射探测分子喷流。SiO的光谱非常宽（− 120至+87 km s− 1），并且蓝移显著，类似于脉泽发射。观察到的几何形状和显着的光谱之间的相似性H2O脉泽和SiO强烈建议的存在脉泽规模（340 Au）的分子喷注，是封闭的扩展无线电喷注。我们提出了一个光盘掩蔽的情况下，强大的蓝移优势的起源，光学厚光盘掩盖了紧凑型喷气机的红移叶。
We report the first detection of a radio continuum and molecular jet associated with a dominant blue-shifted maser source, G353.273+0.641. A radio jet is extended 3000 au along the north-west–south-east (NW–SE) direction. H2O masers are found to be clustered in the root of a bipolar radio jet. A molecular jet is detected by thermal SiO (= 0,J= 2–1) emission. The SiO spectrum is extremely wide ( − 120 to +87 km s− 1) and significantly blue-shift dominated, similar to the maser emission. The observed geometry and remarkable spectral similarity between H2O maser and SiO strongly suggest the existence of a maser-scale ( ∼ 340 au) molecular jet that is enclosed by the extended radio jet. We propose a disc-masking scenario as the origin of the strong blue-shift dominance, where an optically thick disc obscures a red-shifted lobe of a compact jet.