Donghui Jeong Assistant Professor in Astronomy & Astrophysics518 Davey Lab University Park, PA 16802 Phone: +1 814-865-1117 Fax: +1 814-863-2842 Email: djeong@psu.edu Personal webpage |

I am a theoretical astrophysicist and cosmologist who specializes in extracting cosmological information from the large-scale structure observations such as distribution of high redshift galaxies and anisotropies of cosmic microwave background radiation. From the large-scale observations, I am pursuing the answers to following questions:

- How did the Universe begin (inflation)?
- Why is the Universe accelerating now (dark energy)
- What is the mass of neutrino?
- Is general theory of relativity valid on large scales and at early times?

I have been developing tools to overcome theoretical and observational challenges in obtaining correct cosmological information from the surveys: (i) the effect of surveying conditions (window function) and (ii) the effect of non-linearities, both of which alter the observed statistics from the simplest linear theory predictions, and (iii) the covariance matrix that quantifies the uncertainties in the observation. I have also been proposing new statistical observables (clustering fossils and cosmic rulers) that will open up the window to the exotica (new vector or tensor fields) which are unobservable otherwise.

Currently, I am a member of the Hobby Eberly Telescope Dark Energy Experiment (HETDEX), a spectroscopic survey aiming to measure the properties of dark energy at high redshift. For the HETDEX survey, I have developed the data analysis pipeline as well as the theoretical modeling for the statistical observables such as power spectrum and bispectrum. I will play a leading role in extracting cosmological information from the dataset when the survey starts in Fall 2014.