Optimal transport reconstruction of baryon acoustic oscillations

F Nikakhtar, RK Sheth, B Lévy, R Mohayaee - Physical Review Letters, 2022 - APS
A weighted, semidiscrete, fast optimal transport (OT) algorithm for reconstructing the
Lagrangian positions of protohalos from their evolved Eulerian positions is presented. The …

Model-agnostic cosmological constraints from the baryon acoustic oscillation feature in redshift space

A Paranjape, RK Sheth - Monthly Notices of the Royal …, 2023 - academic.oup.com
We develop a framework for self-consistently extracting cosmological information from the
clustering of tracers in redshift space, without relying on model-dependent templates to …

Bayesian evidence comparison for distance scale estimates

A Paranjape, RK Sheth - Monthly Notices of the Royal …, 2022 - academic.oup.com
Constraints on cosmological parameters are often distilled from sky surveys by fitting
templates to summary statistics of the data that are motivated by a fiducial cosmological …

Model-agnostic basis functions for the 2-point correlation function of dark matter in linear theory

A Paranjape, RK Sheth - arXiv preprint arXiv:2410.21374, 2024 - arxiv.org
We consider approximating the linearly evolved 2-point correlation function (2pcf) of dark
matter $\xi_ {\rm lin}(r;\boldsymbol {\theta}) $ in a cosmological model with parameters …

A simulated annealing approach to parameter inference with expensive likelihoods

A Paranjape - arXiv preprint arXiv:2205.07906, 2022 - arxiv.org
We present a new approach to parameter inference targeted on generic situations where the
evaluation of the likelihood $\mathcal {L} $(ie, the probability to observe the data given a …