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About

A. K. Dupree is a leading astrophysicist whose research centers on stellar astrophysics, particularly the behavior and evolution of red supergiant stars. A key contributor to the study of Betelgeuse, Dupree has been instrumental in unraveling the mysteries behind the star’s dramatic “Great Dimming” in 2020. Using spectroscopic and photometric data from observatories like STELLA and Fairborn, Dupree’s work has revealed complex pulsation modes, including a fundamental mode at ~400 days and a long secondary period (LSP) of ~2400 days, whose origin remains a puzzle. Their 2024 paper on Betelgeuse’s photospheric tomography, with 9 citations, provides critical insights into the star’s unusual behavior post-dimming. Dupree also played a key role in the development of the Hectochelle spectrograph (2011, 67 citations), a multiobject echelle instrument deployed at the MMT Observatory that has enabled high-resolution spectroscopy of numerous celestial targets. With a career spanning decades, Dupree’s contributions have significantly advanced our understanding of stellar variability and the life cycles of massive stars, making them a respected figure in the field.