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Relaxed cool-core galaxy cluster studied at redshift 1.16

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Research area:physics-astronomyastrophysics-stellar

What the study found

The study reports new Chandra observations of SPT-CL J2215-3537, a galaxy cluster at redshift 1.16. The authors describe it as the second-most distant relaxed, cool-core cluster identified to date.

Why the authors say this matters

The authors say this cluster is a useful high-redshift benchmark for understanding how cool cores form and how massive galaxy clusters evolve. They also note that its resolved cool core provides context for the massive starburst seen in its central galaxy.

What the researchers tested

The researchers used Chandra X-ray observations to study the cluster’s total mass profile, thermodynamic profiles, scaling relations, and metal enrichment. They also compared its thermodynamic and cosmological properties with a sample of well-studied, lower-redshift relaxed clusters.

What worked and what didn't

The observations allowed the team to constrain the cluster’s total mass profile and resolve its cool core. They also investigated gas mass, average temperature, and X-ray luminosity, along with metal enrichment, in the cluster.

What to keep in mind

The abstract does not describe specific numerical results, detailed uncertainties, or methodological limitations. It also does not provide the full comparison outcomes with lower-redshift clusters.

Key points

  • SPT-CL J2215-3537 is described as a relaxed, cool-core galaxy cluster at redshift 1.16.
  • The cluster is said to be the second-most distant relaxed, cool-core cluster identified to date.
  • Chandra observations were used to constrain its total mass profile and study its thermodynamic properties.
  • The study examined gas mass, average temperature, X-ray luminosity, and metal enrichment.
  • The authors say the cluster can serve as a high-redshift benchmark for studying cool-core formation and cluster evolution.

Disclosure

Research title:
Relaxed cool-core galaxy cluster studied at redshift 1.16
Authors:
Haley R. Stueber, Adam B. Mantz, Steven W. Allen, Anthony M. Flores, R. Glenn Morris, Abigail Y. Pan, Taweewat Somboonpanyakul, Lindsey E. Bleem, Michael S. Calzadilla, Benjamin Floyd, Julie Hlavacek-Larrondo, Michael McDonald, Arnab Sarkar
Publication date:
2026-01-29
DOI:
10.3847/1538-4357/ae3005
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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