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The Physics of Galaxy Cluster Outskirts

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arxiv 1810.00890 v2 pith:T77B5DT5 submitted 2018-10-01 astro-ph.CO astro-ph.GA

classification astro-ph.COastro-ph.GA
keywords clustergalaxyoutskirtsclustersmatteraccreteacrossastrophysics
verification ladder T0 review T1 audit T2 compute T3 formal
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As the largest virialized structures in the universe, galaxy clusters continue to grow and accrete matter from the cosmic web. Due to the low gas density in the outskirts of clusters, measurements are very challenging, requiring extremely sensitive telescopes across the entire electromagnetic spectrum. Observations using X-rays, the Sunyaev-Zeldovich effect, and weak lensing and galaxy distributions from the optical band, have over the last decade helped to unravel this exciting new frontier of cluster astrophysics, where the infall and virialization of matter takes place. Here, we review the current state of the art in our observational and theoretical understanding of cluster outskirts, and discuss future prospects for exploration using newly planned and proposed observatories.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Thermal Sunyaev-Zel'dovich cross-correlations with unWISE galaxies: disentangling radio contamination, dust properties, and electron pressure

    astro-ph.CO 2026-06 conditional novelty 6.0 of 10

    Adding a fitted radio-emission component to tSZ×galaxy cross-spectra removes an apparent negative small-scale signal and yields spectra consistent with a standard halo model (9.5–11σ BIC preference for the radio term).

  2. S-PLUS Clusters And Large-scale Environments (SCALE): I. A catalog of known clusters and groups in DR5 and a pilot study of Abell 4038

    astro-ph.CO 2026-07 conditional novelty 5.0 of 10

    SCALE delivers dynamical properties for 83 known z≤0.1 systems and uses S-PLUS photo-zs plus RPM to map Abell 4038 substructure and mass-dependent color-concentration trends.

  3. Thermal Sunyaev-Zel'dovich cross-correlations with unWISE galaxies: disentangling radio contamination, dust properties, and electron pressure

    astro-ph.CO 2026-06 unverdicted novelty 5.0 of 10

    Radio contamination must be jointly fit with tSZ and CIB in unWISE-Planck/ACT cross-spectra; its inclusion yields positive signals to ℓ ≃ 6000 that match a two-parameter generalized NFW pressure profile.

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