NOAO >   Observing Info >   Approved Programs >   2004A-0381

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Proposal Information for 2004A-0381


PI: Salman Hameed, University of Massachusetts/Smith College, shameed@earth.ast.smith.edu
Address: Astronomy Department, McConnell 410B, Smith College, Northampton, MA 01063

CoI: Daniel Wang, University of Massachusetts

Title: Exploring X-ray - H(alpha) Connection to Test Galaxy Formation Theories

Abstract: Models of galaxy formation make specific predictions regarding the evolution of gas residing in the halos of disk galaxies. Recent observations from Chandra have detected the predicted diffuse X-ray emission from the cooling gas in some nearby bulge-dominated galaxies. We propose deep narrow-band imaging observations of H(alpha) emission to measure, or tightly constrain, the content and morphology of warm gas in four massive early-type disk galaxies. These observations, as part of our ongoing multi-wavelength study of these galaxies, will enable us to characterize the origin and evolution of various gaseous components and their relationship with other galaxy properties. This study will provide a critical link between our understanding of spirals and elliptical galaxies and may help constrain models of galaxy formation.


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 >   2004A-0381

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