David J. Schlegel
Princeton University, Lawrence Berkeley National Laboratory, DESA
Papers
10
Total Citations
1,185
H-Index
9
About
David J. Schlegel is a leading architect of the massive robotic spectrographic surveys that are mapping the universe in unprecedented detail. His primary research areas are observational cosmology, dark energy, and the development of large-scale spectroscopic instrumentation. Schlegel’s most transformative contribution is his central role in the Dark Energy Spectroscopic Instrument (DESI), a revolutionary project that uses 5,000 robotic fiber positioners to simultaneously capture the spectra of tens of millions of galaxies and quasars. His work on DESI’s focal plane system, fiber optics, and astrometric calibration has been critical to the instrument’s success, enabling the first detection of the baryon acoustic oscillation (BAO) signal from early DESI data—a key milestone in measuring cosmic distances and understanding dark energy. With over 1,100 citations across his most-cited papers, including foundational work on automated photometric monitoring, Schlegel’s impact is profound. He is also a driving force behind the proposed MegaMapper, a next-generation Stage-5 instrument designed to probe inflation and dark energy at even higher redshifts, cementing his legacy as a visionary in experimental cosmology.
Research Focus
Key Achievements
Top Papers
- 1A Photometricity and Extinction Monitor at the Apache Point Observatory747 citations · 2001
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- 3The BigBOSS Experiment80 citations · 2011
- 4Overview of the Fiber System for the Dark Energy Spectroscopic Instrument57 citations · 2024
- 5First detection of the BAO signal from early DESI data37 citations · 2023
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