About Me
Education:
PhD in Physics - The Ohio State University (2021)
ScB in Astrophysics - Brown University (2016)
Research Interests:
survey cosmology, theoretical cosmology, constraints on fundamental physics
Publications:
Link to my publication record on ADS
Research
I am interested in combining data from current and upcoming astronomical surveys to better constrain
cosmological parameters, test the Lambda-CDM cosmological model against alternatives,
uncover the nature of dark energy, and learn more about fundamental physics. I work on analytical
modeling, cosmological codes, and simulations to inform what kinds of constraints we could expect
from new data. Given the enormous influx of astronomical data that will come from Stage IV
surveys over the next several years, now is the time to ensure we have the requisite theoretical and
computational infrastructure to maximize the information we can glean from these experiments.
Recently, I have been working on a project to measure correlations between Hyper-Suprime Cam
galaxy clustering, cosmic shear, and Atacama Cosmology Telescope CMB lensing. We are currently
using simulations to evaluate how different modeling choices and scale cuts will impact our
cosmological and astrophysical constraints. This analysis is expected to be completed in early 2023.
Separately, I am working on characterizing pixel-level detector effects in H4RGs
that will be part of the Prime Focus Spectrograph.
Contact
Email: jgivans@princeton.edu
Address: Peyton Hall Room 108A, 4 Ivy Lane, Princeton, NJ 08544