Coma Cluster DESI galaxies Virtual Observatory Resource

Authors
  1. Pedratti S.
  2. Pizzuti L.
  3. Fossati M.
  4. Biviano A.
  5. Boselli A.
  6. Ragagnin A.,Carlin A.
  7. Published by
    CDS
Abstract

We investigate the kinematic properties of the Coma galaxy cluster using a new, large, spectroscopic sample of member galaxies, from the Dark Energy Spectroscopic Instrument (DESI). By means of the MG-MAMPOSST code, which is based on the Jeans equation, we jointly reconstruct the total cluster mass profile and the velocity anisotropy profile. Assuming a Navarro-Frenk-White model, we estimate a virial mass of M200c=1.04^+0.07^_-0.08_(stat)+/-0.09(syst)x10^15^M_{sun}_, corresponding to r200c=2.07+/-0.05Mpc and a scale radius for the mass profile of rs=0.73^+0.30^_-0.24_ (stat) +/- 0.21 (syst) Mpc, which provides the tightest robust kinematic mass profile constraint to date. By separately considering the mass of the hot gas and the galaxy stellar mass, we further determined the dark matter mass profile, with M200c^DM^=8.6^+1.2^_-0.8_x10^14^M_{sun}_. We discuss the impact of the mass and galaxy number density parametrisations, the effect induced by different choices of the cluster's rest frame and of the radial range of the kinematic analysis, further comparing our results with previous estimates from the literature. The cluster dynamical state was also assessed, using the spatial and line-of-sight velocity distributions of the members. We also analysed the line-of-sight velocity distributions and anisotropy profiles of different galaxy populations, selected based on their colour (red sequence, green valley, and blue cloud). The orbits of green valley and blue cloud galaxies appear to be more radial in the centre and in the outskirts, respectively, with the latter predicting a higher cluster virial mass. This study provides new insights into the interplay between dynamical and intrinsic properties of galaxies in massive structures, which is fundamental to verify the tight connection between a galaxy's evolution and its environment.

Keywords
  1. galaxy-clusters
  2. galaxies
  3. photometry
  4. visible-astronomy
  5. redshifted
Bibliographic source Bibcode
2026A&A...710A.218P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A218
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/710/A218

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/710/A218
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/710/A218
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/710/A218
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/710/A218/table4?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/710/A218/table4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/710/A218/table4?

History

2026-06-19T12:27:04Z
Resource record created
2026-06-19T11:28:13Z
Updated
2026-06-19T12:27:04Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr