Subarcsecond Imaging of SiO in the HH 211 Protostellar Jet | Zendy

C. J. Chandler | Zendy; John Richer | Zendy

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Subarcsecond Imaging of SiO in the HH 211 Protostellar Jet

Author(s) -

C. J. Chandler,

John Richer

Publication year - 2001

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 - 10.1086/321463

Subject(s) - entrainment (biomusicology) , outflow , jet (fluid) , herbig–haro object , astrophysics , excitation , high resolution , physics , plume , materials science , geology , star formation , mechanics , stars , meteorology , remote sensing , quantum mechanics , rhythm , acoustics

We present images of the HH 211 molecular jet in the SiO v=0, J=1-0 line at43 GHz made with the Very Large Array at approximately 0.5 arcsec resolution.The SiO emission appears to trace primarily internal bowshocks in the outflow,suggesting that the dust and molecular gas are accelerated via promptentrainment at internal working surfaces in the jet. There is also someevidence for limb-brightening of the SiO emission, indicating that SiO emissionmay also arise from entrainment in the jet's boundary layer. Excitationtemperatures of >~150-200 K are inferred from the SiO emission. Enhancements inthe SiO abundance of ~10^6 over interstellar values are observed, and thepossible origin of the SiO is discussed.Comment: 14 pages, 4 figures. Needs aastex, epsfig, times.sty. To appear in the Astrophysical Journal, July 200

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