Hee-Jong Seo

Hee-Jong Seo is an Associate Professor in the Department of Physics and Astronomy at Ohio University's College of Arts and Sciences, where he also serves as the Director of the Astrophysics Institute. His research focuses on high-precision cosmology using large-scale structure to probe dark energy and dark matter.

Research Interests:

• High-precision cosmology with large-scale structure
• Baryon Acoustic Oscillations (BAO) from galaxy surveys and 21cm intensity mapping
• Redshift-space distortions and cosmic shear
• Mitigation of observational systematics using deep learning
• Constraints on neutrino mass and dark energy
• Galaxy-halo connection and clustering analysis

The recent publications reflect a strong focus on BAO reconstruction techniques, systematic error mitigation in galaxy surveys, and cosmological parameter estimation using data from SDSS-III/BOSS, SDSS-IV/eBOSS, and DESI. His work combines theoretical modeling, numerical simulations, and observational data analysis to improve distance measurements and test fundamental physics.

Scientific Awards:

• Department of Energy Early Career Award (DE-SC0019091)

Advising and Grants:
Dr. Seo has secured significant research funding as PI and Co-PI from the Department of Energy, including an Early Career Award. His grants focus on improving dark energy constraints using low-redshift large-scale structures and developing robust reconstruction methods for BAO, redshift-space distortions, and the Alcock-Paczynski effect. While no students are listed, his leadership in major collaborations suggests active mentorship within large survey teams.

Labs and Teams:
Dr. Seo is actively involved in major cosmological surveys, including the Dark Energy Spectroscopic Instrument (DESI), where he co-chairs the Galaxy Quasar Clustering Science Working Group, and the Sloan Digital Sky Survey (SDSS-IV/eBOSS), where he served as Tiling Coordinator and SDSS-IV Architect. He also contributes to the development of public BAO forecasting tools and collaborative research in cosmology.