Joseph DeRose
Assistant Scientist, Brookhaven National Laboratory
I study why the expansion of the universe is speeding up, and what that says about the fundamental building blocks of the Universe. I build the models, simulations and statistical tools that turn maps of millions of galaxies into precise tests of fundamental physics.
Currently
- Combining DESI galaxy maps with weak gravitational lensing to measure how cosmic structure has grown over time.
- Designing Steel: small, spectroscopically calibrated lensing samples that sidestep the largest systematic errors in weak lensing.
- Developing effective field theory models of lensing that use more of the data without being biased by poorly understood small-scale astrophysics.
Collaborations
Much of my science is made possible by large international collaborations I'm part of:
- Dark Energy Spectroscopic Instrument (DESI)
- Rubin Observatory LSST Dark Energy Science Collaboration (DESC)
- Dark Energy Survey (DES)
News
- Steel paper on spectroscopically calibrated lensing source samples is out.
- Two-loop EFT reanalysis of DES Y3 cosmic shear: no S8 tension.
- Released gholax alongside our lensing counterterms paper.
Get in touch
I work with students and early-career researchers at many levels. If you're interested in working together, see prospective students. For everything else, email me at jderose at bnl dot gov.