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

J. H. Lacy | Zendy; D. T. Jaffe | Zendy; Qingfeng Zhu | Zendy; Matthew J. Richter | Zendy; Martin A. Bitner | Zendy; T. K. Greathouse | Zendy; Kevin Volk | Zendy; T. R. Geballe | Zendy; David M. Mehringer | Zendy

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

Author(s) -

J. H. Lacy,

D. T. Jaffe,

Qingfeng Zhu,

Matthew J. Richter,

Martin A. Bitner,

T. K. Greathouse,

Kevin Volk,

T. R. Geballe,

David M. Mehringer

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/513693

Subject(s) - molecular cloud , physics , jet (fluid) , astrophysics , star formation , cluster (spacecraft) , ionization , h ii region , infrared , astronomy , galaxy , stars , ion , quantum mechanics , computer science , thermodynamics , programming language

We have mapped [Ne II] (12.8um) and [S IV] (10.5um) emission from W51 IRS 2with TEXES on Gemini North, and we compare these data to VLA free-freeobservations and VLT near-infrared images. With 0.5" spatial and 4 km/sspectral resolution we are able to separate the ionized gas into severalcomponents: an extended H II region on the front surface of the molecularcloud, several embedded compact H II regions, and a streamer of high velocitygas. 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 isbeing ionized.Comment: 3 pages, 4 figures, 2 movie

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