Physics

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Bryan Pekel

Financial Generalist

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Evgeniy Kurianovych

Research support

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Smiling woman standing in front of a library holding onto a ladder. There is a telescope in the foreground.

Roberta Humphreys

Professor Emerita, School of Physics and Astronomy

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Roberta Humphreys' studies of “Luminous Stars in Nearby Galaxies” (Papers 1 – VIII) demonstrated the existence of an empirical upper luminosity boundary in the HR Diagram and by implication an upper limit to the masses of stars that could evolve to become red supergiants (Humphreys & Davidson 1979). This upper limit, sometimes called the Humphreys-Davidson limit, was not predicted by theory and greatly influenced future work on massive star…

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Astrophysics