James N. Heasley
Professor of Astronomy

Ph.D., 1973, Yale University

e-mail: heasley@hoku.ifa.hawaii.edu

University of Hawaii
Institute for Astronomy
2680 Woodlawn Drive
Honolulu, HI 96822

Office: Institute for Astronomy, C-212
Phone:(808) 956-6826
FAX:(808) 956-9580

Present Research Interests

Currently, my primary research programs 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, I am 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 I am developing a research program is the area of asteroseismology. My 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.

Selected Publications

"Photometry of Star Clusters near the Galactic Center." 1996. Heasley, J.N., Janes, K.A., Demarque, P., and Zinn, R. Bull. Am. Astron. Soc.,28, 821.

"The Age of NGC 5927: Formation Timescales of the Halo and Thick Disk." 1996. Fullton, L.K., Carney, B.W., Olszewski, E.W., Zinn, R., Demarque, P., Da Costa, G.S., Janes, K.A., and Heasley, J.N. in Formation of the Galatic Halo... Inside and Out, ASP Conference Series, vol. 92, p 269.

"The Prospects for Asteroseismology from Ground-based Sites". 1996, Heasley, J.N., Janes, K.A., LaBonte, B., Guenther, D., Mickey, D.L., and Demarque, P. Pub.Astron.Soc. Pacific, 108, p 723.

"Stellar Photometry Software." 1993, Janes, K.A., and Heasley, J.N. Pub.Astron.Soc. Pacific, 105, 687.

Go to Hoku's Home Page to see links to pages about my "technology intensive" version of Astronomy 140 - Foundations of Astronomy, the Stellar Photometry Software that Ken Janes and I have developed, and "Astronomy for Kids" - an educational outreach page I've developed for my son's elementary school.

This page was updated last on August 1, 1997