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Jim Heasley - Biography

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Jim Heasley is an astronomer at the Institute for Astronomy. He recieved his Ph.D. from Yale University in 1973. His current research interests involve studies of the stellar populations of the Milky Way. The goal of this work is to use star clusters as tracers of the formation and evolution of the Galaxy. The observations for this work uses photometry of star clusters, from both ground based telescopes and the Hubble Space Telescope, to derive color-magnitude diagrams of suitable for comparison with theoretical isochrones. In a related study, he is using parallaxes measured by the Hipparcos satellite to calibrate the distances of low-metallicity subdwarfs so they may be used to deduce the distances to the globular clusters, thereby removing a fundamental uncertainty in deriving the absolute ages of these stellar systems.

A new area of work in which he is developing a research program is the area of asteroseismology. His primary interest here is to use the pulsational analysis of Sun-like stars to probe their internal structure. The initial phase of this work will concentrate on the study of intergrated sunlight to explore potential spectral diagnostics for application in stellar work.

Jim is very interested in Astronomy outreach activities and is the UH project scientist for the Faulkes Educational telescope to be built on Maui.

Last Updated on April 21, 2000

Karen Meech, Institute for Astronomy, University of Hawaii