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About

S. Juneau is a leading cosmologist whose work is central to the Dark Energy Spectroscopic Instrument (DESI) project, a groundbreaking effort to map the universe and understand dark energy. Her primary research focuses on the critical challenge of fiber assignment—the process by which DESI’s 5,000 robotic fibers are directed to observe specific galaxies. Juneau has made pivotal contributions by developing and validating methods to correct for the unavoidable incompleteness and selection biases introduced by this hardware-limited process. Her most cited work, the 2024 “Overview of the Fiber System for the Dark Energy Spectroscopic Instrument” (57 citations), provides a foundational description of this revolutionary instrument. She has also produced key analyses on creating alternate realizations of fiber assignments to ensure unbiased clustering measurements (25 and 10 citations) and characterized the impact of fiber assignment incompleteness on two-point clustering statistics for DESI’s first data release (20 citations). Through these efforts, Juneau is ensuring that DESI’s massive dataset—which will measure 40 million galaxies—yields the most accurate possible constraints on the nature of dark energy, solidifying her role as a vital architect of precision cosmology.