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

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

2007-02-13

arxiv.org/abs/astro-ph/0702327v1

Astrophys.J.658:L45-L49,2007

Astronomy and Astrophysics

Astrophysics

3 pages, 4 figures, 2 movies

Scientific paper

10.1086/513693

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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