NOAO >   Observing Info >   Approved Programs >   2001A-0365

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Proposal Information for 2001A-0365


PI: Heather Morrison, Case Western Reserve U, heather@vegemite.astr.cwru.edu
Address: 10900 Euclid Ave, Cleveland, OH 44106-7215, USA

CoI: John Arabadjis, MIT
CoI: Robbie Dohm-Palmer, Univ of Michigan
CoI: Ken Freeman, Mt Stromlo and Siding Springs Obs
CoI: Paul Harding, Steward Obs
CoI: Amina Helmi, Max Planck, Garching
CoI: Mario Mateo, Univ of Michigan
CoI: John Norris, Mt Stromlo and Siding Springs Obs
CoI: Ed Olszewski, Steward Obs
CoI: Chris Sneden, U Texas, Austin

Title: The Formation of the Outer Halo and the Mass of the Galaxy

Abstract: With distant halo stars we can now map the outer Galactic halo, where previously only satellite galaxies and a few globular clusters were known. This is crucial for an understanding of the manner and timescale of the assembly of the Milky Way's stellar halo and the total mass and shape of its dark halo. Our previous work has proved that the Washington photometric system, in conjunction with spectroscopy, is capable of efficiently identifying halo giants out to 100 kpc or more. We request followup spectroscopy to map velocity substructure, more likely visible in the outer halo because of the long dynamical timescales (our early results give tantalizing suggestions of streams), and to utilize metal-poor giants to constrain the dark halo.


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



NOAO >   Observing Info >   Approved Programs >   2001A-0365

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