Investigating the outskirts of Abell 133 with Suzaku and Chandra observations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00134401" target="_blank" >RIV/00216224:14310/23:00134401 - isvavai.cz</a>

Result on the web

<a href="https://arxiv.org/abs/2306.10110" target="_blank" >https://arxiv.org/abs/2306.10110</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202347191" target="_blank" >10.1051/0004-6361/202347191</a>

Result language

angličtina

Original language name

Investigating the outskirts of Abell 133 with Suzaku and Chandra observations

Original language description

Context. Past observations and simulations have predicted an increasingly inhomogeneous gas distribution towards the outskirts of galaxy clusters. However, the exact properties of such gas clumping are not yet well known. The outskirts of Abell 133 can benefit from deep X-ray observations, with a 2.4 Ms ultra-deep Chandra exposure, as well as eight archival Suzaku pointings, making it a unique laboratory for studying the clumping of the intracluster medium (ICM).Aims. We searched for significant clump candidates with the specific aim of identifying ones that could represent genuine ICM inhomogeneity. To further understand how clumping biases the thermodynamic profiles, we compared the measurements including and excluding the clump candidates.Methods. We jointly analyzed Chandra and Suzaku observations of Abell 133. We selected clump candidates with at least 2 sigma significance based on the Chandra image and we discussed their origins further, using information from the DESI Legacy Imaging Surveys cluster catalog as well as the CFHT r-band image. We performed multiple rounds of Suzaku spectral analysis with different corrections for the underlying point sources and clump distribution and we compared the resulting thermodynamic profiles.Results. We detected 16 clump candidates using Chandra, most of which are identified as background clusters or galaxies - as opposed to intrinsic inhomogeneity. Even after the correction of the resolved clumps, the entropy profile approaching the outskirts still flattens, deviating from the power law model expected from self-similar evolution, which implies that unresolved clumping and other complex physics contribute to the entropy flattening in the outskirts.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GX21-13491X" target="_blank" >GX21-13491X: Exploring the Hot Universe and Understanding Cosmic Feedback</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

—

Volume of the periodical

678

Issue of the periodical within the volume

October

Country of publishing house

FR - FRANCE

Number of pages

14

Pages from-to

1-14

UT code for WoS article

001100987600005

EID of the result in the Scopus database

2-s2.0-85175003652