Research

I've carried out my own near-infrared (NIR) supernova survey, called DEHVILS, which is perhaps the largest uniform sample of NIR SN light curves with good coverage. I have since gotten involved in preparing for NASA's next flagship mission, the Roman Space Telescope, (which will also observe in the NIR), and I am also leading a large effort to compile and analyze all SNe ever observed in the NIR through a study called SAINTS.  

As a part of the Pantheon+ group, I was the first to correct for peculiar velocities in a SN cosmology analysis of this magnitude. And as the sample of SNe Ia grows substantially with surveys such as ATLAS, ZTF, and LSST, I am looking to account for small-scale motions inside galaxy groups for thousands of SN host galaxies using DESI and other spectroscopic surveys.

Dust impacts all cosmological analyses, and recent results (i.e., DESI) have shown that treatments of systematics such as intergalactic dust can have large impacts on uncertainties on cosmological parameter measurements. I am currently working on constraining this systematic with DES data as well as LSST and Roman simulations.