Probabilistic mass-mapping with neural score estimation

نویسندگان

چکیده

Context. Weak lensing mass-mapping is a useful tool for accessing the full distribution of dark matter on sky, but because intrinsic galaxy ellipticies, finite fields, and missing data, recovery maps constitutes challenging, ill-posed inverse problem Aims. We introduce novel methodology that enables efficient sampling high-dimensional Bayesian posterior weak problem, relying simulations to define fully non-Gaussian prior. aim demonstrate accuracy method simulated then proceed apply it mass reconstruction HST/ACS COSMOS field. Methods. The proposed combines elements statistics, analytic theory, recent class deep generative models based neural score matching. This approach allows us make use cosmological theory constrain 2pt statistics solution, understand any differences between this prior from simulations, obtain samples robust uncertainty quantification. Results. in κ TNG find mean significantly outperfoms previous methods (Kaiser–Squires, Wiener filter, Sparsity priors) both root-mean-square error terms Pearson correlation. further illustrate interpretability recovered by establishing close correlation convergence values S/N clusters artificially introduced into Finally, we field, which yields highest-quality map field date. Conclusions. be superior algorithms, scalable, providing uncertainties, using

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ژورنال

عنوان ژورنال: Astronomy and Astrophysics

سال: 2023

ISSN: ['0004-6361', '1432-0746']

DOI: https://doi.org/10.1051/0004-6361/202243054