NOAO >   Observing Info >   Approved Programs >   2009B-0492

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Proposal Information for 2009B-0492


PI: Guy Stringfellow, University of Colorado, Guy.Stringfellow@colorado.edu
Address: Center for Astrophysics and Space Astronomy, 389 UCB, Boulder, CO 80309-0389, USA

CoI: John Bally, University of Colorado
CoI: Xavier Koenig, Smithsonian Astrophysical Observatory
CoI: Adam Ginsburg, University of Colorado
CoI: Lori Allen, NOAO
CoI: Ron Probst, NOAO
CoI: Rob Swaters, University of Maryland
CoI: Francisco Valdes, NOAO

Title: A Definitive Test of Triggered-Sequential Star Formation in the Massive Star Forming Regions W3/4/5

Abstract: We propose to conduct a near-infrared JHK full imaging survey of the W3/4/5 star forming complex down to ~20 mag, ~5 mag deeper than 2MASS. Select regions within W3/4/5 of new jet and outflow sources require \rm H_2, and some [Fe II] and Br(gamma) imaging. This will complete our multi-wavelength ground-based survey, providing essential data on the residing stellar populations, outflows and jets, and interaction of the ionizing OB stellar radiation with the ISM and dense molecular gas (pillars) in which active star formation is occurring. The main objectives are: [1] combine the JHK photometry with optical and Spitzer data to construct complete color-color and magnitude-color diagrams, yielding spatially resolved luminosity and mass functions of the various complexes; [2] identify which Bolocam 1.1(micron) dust continuum emission cores contain stars; [3] obtain critical narrow-band imaging of key YSOs (jet, outflow, and proplyd/cometary sources) previously identified from our Mayall 4m MOSAIC H(alpha), [S II], and \it i-band imaging survey - evidence of recent (triggered?) star formation; [4] combine these data with other existing extensive multi- wavelength data to investigate spatially segregated age gradients, and definitively determine to what degree triggered and sequential star formation has occurred, construct stellar SEDs, and assess disk morphology and ages.


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