Donghui Jeong

The self

I'm an astrophysicist/cosmologist who studies the origin and evolution of our Universe.

I am working as a professor at Astronomy and Astrophysics department, Eberly College of Science, the Pennsylvania State University. I am also a part of the Center for Theoretical and Observational Cosmology (CTOC) in the Institute for Gravitation & the Cosmos (IGC). Prior to this, I was a postdoctoral fellow in theoretical cosmology in Physics and Astronomy department at the Johns Hopkins University and the TAPIR (Theoretical AstroPhysics Including Relativity) group in PMA Division (Physics, Mathematics and Astronomy) at Caltech working with Prof. Marc Kamionkowski. Even before, I was a graduate student of Texas Cosmology Center (TCC) and the Astronomy Department at the University of Texas at Austin. My thesis adviser is Prof. Eiichiro Komatsu, and here are my academic trees from mathematics genealogy project and academictree.org

I am working on various aspects of theoretical cosmology, but I also enjoy working with real data.
In particular, I am working for a high redshift galaxy survey called HETDEX (Hobby-Eberly Telescope Dark Energy eXperiment). The main theme of this mission is studying the properties of dark energy by analyzing the distribution of galaxies (Lyman-alpha emitters). In the current survey design, we shall observe about a million galaxies within 540 sq. deg. area in the sky at the redshift range 1.9 < z <3.5. The survey data collection completed in July 2024.
I'm also working with the LVK collaboration as an external collaborator for the searching sub-Chandrasekhar mass black holes.

Press Release/Media Coverage

• Dark energy is weakening and the universe could eventually collapse, study says (NPR, 20 March 2025)<
• In Search of the Most Massive Star (Sky and Telescope Magazine, August 2024)
• What is the cosmic web made of?(Astronomy Magazine, 9 October 2023)
• Mapping the local cosmic web: Dark matter map reveals hidden bridges between galaxies(Phys.org, 25 May 2021)
• HETDEX and the 'Quest for the Rest'(ECoS Science Journal, 18 March 2021)
• Hobby-Eberly Telescope Dark Energy Experiment survey begins full operations(December 2020)
• Cosmic tango between the very small and the very large(Phys.org, 30 July 2020)