REVIEW 8 cited by
Continuous Fields and Discrete Samples: Reconstruction through Delaunay Tessellations
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
Here we introduce the Delaunay Density Estimator Method. Its purpose is rendering a fully volume-covering reconstruction of a density field from a set of discrete data points sampling this field. Reconstructing density or intensity fields from a set of irregularly sampled data is a recurring key issue in operations on astronomical data sets, both in an observational context as well as in the context of numerical simulations. Our technique is based upon the stochastic geometric concept of the Delaunay tessellation generated by the point set. We shortly describe the method, and illustrate its virtues by means of an application to an N-body simulation of cosmic structure formation. The presented technique is a fully adaptive method: automatically it probes high density regions at maximum possible resolution, while low density regions are recovered as moderately varying regions devoid of the often irritating shot-noise effects. Of equal importance is its capability to sharply and undilutedly recover anisotropic density features like filaments and walls. The prominence of such features at a range of resolution levels within a hierarchical clustering scenario as the example of the standard CDM scenario is shown to be impressively recovered by our scheme.
Forward citations
Cited by 8 Pith papers
-
Interpreting the stacked kinetic SZ effect I: velocity reconstruction and non-linear velocity effects
Non-linear velocity terms cancel in real-space linear reconstruction, but redshift-space distortions reintroduce a 10–20% small-scale suppression of the stacked kSZ signal.
-
IllustrisTNG50 angular momentum maps: tracing the morpho-kinematic evolution of galaxies
TNG50 stellar disks are grouped into four j-types from sAM surface density maps, revealing a redshift-dependent sequence from irregular to barred forms driven by gas content and V/σ.
-
Improved recipes for peculiar velocity power spectra using Evolution Mapping
Improved fitting functions for P_θθ(k) and P_δθ(k) parametrized by σ12 achieve 1-2% accuracy across cosmologies and outperform existing prescriptions.
-
Cosmic Velocity Flows: from Theory to Observations
A methods-heavy thesis presenting the Sahyadri simulation suite, calibrated filament reconstruction with Fourier smoothing, and the hierarchical Voronoi filament finder Skeletor, with phase-space analyses of filament ...
-
Nearby dwarf galaxies with extreme star formation rates: a window into dwarf-galaxy evolution in the early Universe
Nearby low-mass dwarfs with extreme star formation rates show much higher interaction and early-type fractions than matched normal dwarfs, suggesting collisions drive stellar assembly in early dwarfs.
-
Evolution of Cosmic Voids: Structure, Galaxies, and Dynamics
Void galaxies fade, their luminosity functions flatten, and simulations predict outward flows, while observed voids show a central galaxy excess that ΛCDM models lack.
-
The quenching of star formation in dwarf galaxies: new perspectives from deep-wide surveys
Deep survey data show that a substantial fraction of dwarf galaxies are quenched in low-density environments, with proximity to massive galaxies the strongest environmental correlate.
-
Galaxy evolution in the cosmic web: the relative impact of nodes and filaments in the EAGLE simulation
In the EAGLE simulation, red galaxies cluster near filament spines and nodes, blue galaxies dominate outskirts, and the mass-colour coupling strengthens away from nodes at fixed filament proximity.
Discussion (0). Continue with ORCID to comment.