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Faculty

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Photo of Ue-Li Pen
Professor, Acting Director of CITA Cosmology, n-body and hydro simulations, CMB, topological defects.Ph.D. 1995, Princeton
Work Phone: (416)978-6477 Website: http://www.cita.utoronto.ca/~pen/
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Photo of John R. Percy
Professor, Emeritus Variable stars and stellar evolution; education and outreach.Ph.D. 1968, Toronto
Work Phone: (416)978-2577 Website: http://www.astro.utoronto.ca/~percy/EPOindex.htm

Biographical Info

I use variable stars to study the nature and evolution of stars. My current interest centers on
pulsating red giants and supergiants, which represent the semi-final stages of stars’ lives, and are poorly-understood, compared with other variable star types.  I use archival data, especially from the
American Association of Variable Star Observers (AAVSO), which stretches back for a century or more, edit the Journal of the AAVSO, and otherwise facilitate the contributions of skilled amateurs to
variable star research. I am also engaged in a wide variety of astronomy education and outreach projects.
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Photo of Harald Pfeiffer
Assistant Professor, CITA Numerical relativity; black holes; Neutron stars; gravitational wave astrophysicsPh.D. 2003, Cornell
Work Phone: (416) 978-8497 Website: http://www.cita.utoronto.ca/~pfeiffer
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