Grecco Oyarzun

Postdoctoral Fellow

Astrophysics & Cosmology

Email: grecco.oyarzun@ou.edu

Office: NH 239

Research Lead: Nikole Nielsen

Education

Ph.D. UC Santa Cruz (2022)

Bio

I utilize observations of Galaxies to learn how they form and evolve over cosmic history. More specifically, I specialize in studying Galaxy Stellar Populations, the Galaxy-Halo Connection, Damped Lyman Alpha Absorbers, and the Circum-galactic medium.

Featured Publications

"The KAGG survey: KCWI Analysis of Gas around Galaxies at z~3-5", G.A. Oyarzun et al., arXiv:2609.25221 (2026)

"The Qz5 Survey. I. How the H i Mass Density of the Universe Evolves with Cosmic Time", G.A. Oyarzun et al., ApJ, 983, 10 (2025)

"Galaxy Assembly Bias in the Stellar-to-halo Mass Relation for Red Central Galaxies from SDSS", G.A. Oyarzun et al., ApJ, 974, 29 (2024)

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