Phase-Space Delaunay Tessellation Field Estimator

2024/02/26 by Job Feldbrugge, Feldbrugge, Job · 2 citations
Environmental Science · Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Planetary Science and Exploration #Soil Geostatistics and Mapping #Soil Moisture and Remote Sensing

paper · pdf · doi:10.48550/arxiv.2402.16234

openalex publication_date 2024/02/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The reconstruction of density and velocity fields is of central importance to the interpretation of N-body simulations. We propose a phase-space extension of the Delaunay tessellation field estimator (DTFE) that tracks the dark matter fluid in phase-space. The new reconstruction scheme removes several artifacts from the conventional DTFE in multi-stream regions, while preserving the adaptive resolution in high-density regions and yielding continuous fields. The estimator also removes tessellation artifacts of a previously proposed phase-space reconstruction scheme.

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