Arcelia Hermosillo Ruiz

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About

Arcelia Hermosillo Ruiz is an observational astronomer whose work centers on stellar multiplicity, adaptive optics, and the demographics of nearby stars. Her research has made significant contributions to understanding the frequency and nature of stellar companions in the solar neighborhood. In her most-cited study, “An Adaptive Optics Census of Companions to Northern Stars Within 25 pc with Robo-AO” (2022, 14 citations), she led a comprehensive survey of 1,157 stars within 25 parsecs, using the Robo-AO adaptive optics system to detect tight companions across all spectral types. This work provided critical constraints on binary star statistics and the formation mechanisms of stellar systems. By combining high-resolution imaging with volume-limited sampling, Hermosillo Ruiz has helped refine our picture of the local stellar population and the role of multiplicity in stellar evolution. Her census stands as a key reference for future studies of nearby stars and exoplanet host systems, demonstrating her impact in advancing the field of stellar astrophysics.