BibTeX

@article{2310.19910v1,
Author        = {Florian List and Noemi Anau Montel and Christoph Weniger},
Title         = {Bayesian Simulation-based Inference for Cosmological Initial Conditions},
Eprint        = {2310.19910v1},
ArchivePrefix = {arXiv},
PrimaryClass  = {astro-ph.CO},
Abstract      = {Reconstructing astrophysical and cosmological fields from observations is
challenging. It requires accounting for non-linear transformations, mixing of
spatial structure, and noise. In contrast, forward simulators that map fields
to observations are readily available for many applications. We present a
versatile Bayesian field reconstruction algorithm rooted in simulation-based
inference and enhanced by autoregressive modeling. The proposed technique is
applicable to generic (non-differentiable) forward simulators and allows
sampling from the posterior for the underlying field. We show first promising
results on a proof-of-concept application: the recovery of cosmological initial
conditions from late-time density fields.},
Year          = {2023},
Month         = {Oct},
Url           = {http://arxiv.org/abs/2310.19910v1},
File          = {2310.19910v1.pdf}
}