NOAO >   Observing Info >   Approved Programs >   2007B-0425

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Proposal Information for 2007B-0425


PI: John Bally, University of Colorado, John.Bally@colorado.edu
Address: Astrophysical and Planetary Sciences, 389 UCB, Colorado Blvd, Boulder, Colorado 80309, USA

CoI: Lori Allen, Center for Astrophysics
CoI: Guy Stringfellow, University of Colorado
CoI: Nathan Smith, University of California at Berkeley
CoI: Xavier Paul Koenig, Harvard University, Center for Astrophysics
CoI: Tom Megeath, University of Toledo

Title: Mosaic Narrow-band Imaging of the Massive Star Formaing Complex W3/4/5

Abstract: We propose a narrow-band H(alpha), [SII], and partial [OIII] survey of the massive star and cluster forming complex containing the HII regions W3, W4, and W5 using the Mosaic CCD imager on the KPNO 4m. The W3/4/5 complex is a northern-hemisphere analog of the Carina Nebula; it has produced over 80 OB stars, several giant HII regions, and thousands of low mass stars. Our main goals are: [1] Investigate star formation in a region irradiated by nearly 100 times the UV radiation of the Orion Nebula. [2] Search for irradiated jets and Herbig-Haro outflows that are signposts of on-going accretion onto their central young stars. [3] Characterize the relationship between the Spitzer-identified young stars and clusters and the massive stars, their HII regions, and ionization fronts. [4] Probe the nature of Spitzer identified cometary clouds. [5] Obtain visual photometry of Spitzer identified YSOs. [6] Study the multiplicity fraction of young stars unresolved by Spitzer. [7] Probe the relationship of exotic objects such as the externally irradiated circumstellar ring WeBo 1 and the micro-quasar LSI+61 303 to the W3/4/5 complex and search for additional unique objects. [8] Study the superbubble ionization front of this region. Our survey will produce stunning images that will serve multiple public-outreach and educational purposes.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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