I am a graduate student in astrophysics at Princeton University. My research focuses on weak lensing cosmology, particularly the measurement of intrinsic alignments and baryonic feedback. I'm also involved in the commissioning of the Prime Focus Spectrograph. Some recent projects are listed below.
Intrinsic alignments are a limiting systematic for cosmic shear studies; coherent distortions from lensing by foreground structure must be separated from correlations between galaxy shapes and the local density field. We make direct measurements of intrinsic alignments using spectroscopy from the first year of the DESI Survey and imaging from four lensing surveys: DES, HSC, KiDS, and SDSS. These measurements will inform novel modeling of intrinsic alignments for cosmic shear and the optimal selection of blue weakly aligned galaxies.
With Alex Amon, Jamie McCullough, and the DESI collaboration.
Tracing the ISM content of quenched galaxies across cosmic time is key to understanding how and when galaxies cease star formation. However, measurements of dust attenuation are notoriously challenging for quiescent galaxies, particularly at higher redshifts. With deep 20 band JWST NIRCam from the UNCOVER program, we significantly suppresses the dust—age degeneracy and reveal the prevalance of dust reddening in massive quiescent galaxies at cosmic noon.
With Jenny Greene, David Setton, and the UNCOVER collaboration.
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A historic problem in astronomy is the recovery of the true shape and spectral energy distribution (SED) of a galaxy despite attenuation by interstellar dust embedded in the same galaxy. We present a method for jointly modeling the spatially resolved stellar and dust properties of galaxies from multi-band images. To capture the diverse geometries of galaxies, we consider non-parametric morphologies, stabilized by two neural networks that act as data-driven priors.
With Peter Melchior.
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