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May 12, 2026

Novel insights into the Coma cluster kinematics with DESI. I. Linking mass profile, orbital anisotropy, and galaxy populations

S. Pedratti L. Pizzuti M. Fossati A. Biviano A. Boselli A. Ragagnin A. Carlin

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Key Points

This research aims to evaluate the kinematic properties and mass profile of the Coma galaxy cluster using a large spectroscopic sample.
Utilized spectroscopic data from the Dark Energy Spectroscopic Instrument (DESI) to analyze member galaxies.
Reconstructed total cluster mass profile and velocity anisotropy profile using the Jeans equation.
Assumed a Navarro-Frenk-White model for virial mass estimation.
Estimated a virial mass of 1.04 (± 0.09) x 10^15 M_⊙, corresponding to a scale radius r_200 c = 2.07 ± 0.05 Mpc.
Determined a dark matter mass profile of 8.6 (± 1.2) x 10^14 M_⊙.
Findings indicate differing orbits of galaxy populations, with green valley galaxies exhibiting more radial orbits.

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Implication

Investigates kinematic properties in galaxy clusters, suggesting new mass estimates and dynamics.

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Cite This Study

Pedratti et al. (2026) studied this question.

synapsesocial.com/papers/6a0d5098f03e14405aa9c7ec https://doi.org/10.1051/0004-6361/202659068/pdf

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