#globular clusters
9 papers match
Constraining the shape of dark matter haloes using only starlight II. Tests of the technique with objects of known gravitational potential
Jorge Sanchez Almeida, Angel R. Plastino, Sergio Guerra Arencibia +2
The paper validates a photometry‑based Eddington Inversion Method (EIM‑tool) that tests whether observed stellar distributions are physically consistent with cuspy or cored dark‑ma…
The Extended Globular Cluster System of the archetypal "failed galaxy" Dragonfly-44 from deep white-light Hubble Space Telescope imaging
Maria Luisa Buzzo, Pieter van Dokkum, Roberto Abraham +2
Deep Hubble imaging reveals that the ultra-diffuse galaxy Dragonfly-44 hosts about 78 globular clusters, confirming its extremely high dark‑matter content and supporting its classi…
Phase-Space Crystallization in Galactic Globular Clusters: A Gaia-Based Metric and Implications for Technosignature Searches
Bo-Lun Huang, Zhen-Zhao Tao, Tong-Jie Zhang
The paper introduces a model‑independent index (C_index) that quantifies ordered radial and kinematic substructure in Galactic globular clusters using Gaia EDR3 data, identifies a…
Discrepancies between Chandrasekhar's theory of relaxation and -body simulations
Kerwann Tep, Douglas C. Heggie
The paper compares Chandrasekian orbit‑averaged relaxation theory with high‑precision N‑body simulations of anisotropic globular clusters, finding reduced but still position‑depend…
A Statistical Framework to Identify Kinematically Outlying LMC Globular Clusters and Implications for the LMC's Dark Matter Profile
Tamojeet Roychowdhury, Navdha, Himansh Rathore +1
The authors develop a statistical method that combines Gaia‑DR3 proper motions with line‑of‑sight velocities to identify kinematically outlying globular clusters in the Large Magel…
The complex stellar system M 22: confirming abundance variations with high precision differential measurements
M. McKenzie, D. Yong, A. F. Marino +8
The authors perform high‑precision differential spectroscopy of six red‑giant stars in the globular‑cluster‑like system M 22, confirming internal abundance variations in many eleme…