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W51 IRS 2: A Massive Jet Emerging from a Molecular Cloud into an H II Region

J. H. Lacy·D. T. Jaffe·Q. Zhu·M. J. Richter·M. A. Bitner·T. K. Greathouse·K. Volk·T. R. Geballe·D. M. Mehringer
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Abstract

We have mapped [Ne II] (12.8um) and [S IV] (10.5um) emission from W51 IRS 2 with TEXES on Gemini North, and we compare these data to VLA free-free observations and VLT near-infrared images. With 0.5" spatial and 4 km/s spectral resolution we are able to separate the ionized gas into several components: an extended H II region on the front surface of the molecular cloud, several embedded compact H II regions, and a streamer of high velocity gas. We interpret the high velocity streamer as a precessing or fan-like jet, which has emerged from the molecular cloud into an OB star cluster where it is being ionized.

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J. H. Lacy, D. T. Jaffe, Q. Zhu, M. J. Richter, M. A. Bitner, T. K. Greathouse, K. Volk, T. R. Geballe, D. M. Mehringer. 2007-02-13. W51 IRS 2: A Massive Jet Emerging from a Molecular Cloud into an H II Region. https://doi.org/10.1086/513693

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