NGC 5139 Archives

Correlations of crystallization metrics with cluster mass, Galactocentric distance, and a dynamical-age proxy. Top row: Cindex versus log(Mcl/M⊙), RGC, and log10(tage/trh). Bottom row: the N⋆-corrected residual index Cresid versus the same quantities. Spearman rank coefficients and two-sided p-values are printed in each panel. Star symbols mark Tier 1 clusters. -- astro-ph.GA

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Phase-Space Crystallization in Galactic Globular Clusters: A Gaia-Based Metric and Implications for Technosignature Searches

by Keith CowingMay 9, 2026May 9, 2026

We develop a model-independent framework to quantify phase-space “crystallization”, the degree of ordered radial and kinematic substructure, in 79 Galactic globular clusters using the Gaia EDR3-based membership catalogue of E. […]

NGC 5139

Phase-Space Crystallization in Galactic Globular Clusters: A Gaia-Based Metric and Implications for Technosignature Searches

Gullies In The Equatorial Region of Mars

Orbital Biosignature Assay: Watching Forests Grow From Space

Signs And Signatures Of Intelligence

CO Snow Lines Are Stabilised By The Vertical Transport Of Volatiles

Multi-year Ground-Based Survey Photometry of Active Comet 103P/Hartley 2 and Centaur (2060) Chiron: A Tale of Two Comets in the Pre-LSST Era