2 papers
math-ph2025
Reconstruction of the observable universe from the integrated Sachs-Wolfe effect
Julianne Chung, Yiran Wang
The integrated Sachs-Wolfe (ISW) effect is a property of the Cosmic Microwave Background (CMB), in which photons from the CMB are gravitationally redshifted, causing the anisotropi…
math.NA2024
Iterative Reconstruction Methods for Cosmological X-Ray Tomography
Julianne Chung, Lucas Onisk, Yiran Wang
We consider the imaging of cosmic strings by using Cosmic Microwave Background (CMB) data. Mathematically, we study the inversion of an X-ray transform in Lorentzian geometry, call…