Asteroseismology

asteroseimology-hubble-space-telescope

In addition to understanding how stars evolve, studying how they are born and how they die can lead to understanding how the heavy elements form, and how they are disseminated in the Universe. At Delaware, we intensively study white dwarf stars, the endpoints of the evolution of low mass stars like the Sun. Although immense amounts of information about the surfaces of stars can be obtained by studying the light emitted by stars, this gives little direct information about the interiors of stars. A powerful tool for probing the interior structure of stars is asteroseismology, which is similar to how seismologists study the interior of the Earth and other solid planets through the use of earthquake oscillations. The Delaware Asteroseismic Research Center (DARC) at UD promotes and facilitates the study of stellar seismology, by taking the lead in organizing global multisite campaigns, including the Whole Earth Telescope (WET), in which observatories around the World monitor the star of interest while it is in their night sky. Particular emphasis at UD is on asteroseismology of white dwarf stars.

Selected Publications: 

J. Dalessio, J. Provencal, D. Sullivan, H. Shipman, and S. Thompson, Searching for neutrinos in pulsating white dwarfs, American Astronomical Society, AAS Meeting #213, #333.01 (2009).