The bulk motion of gas in the core of the Centaurus galaxy cluster
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00144415" target="_blank" >RIV/00216224:14310/25:00144415 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41586-024-08561-z" target="_blank" >https://www.nature.com/articles/s41586-024-08561-z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41586-024-08561-z" target="_blank" >10.1038/s41586-024-08561-z</a>
Alternative languages
Result language
angličtina
Original language name
The bulk motion of gas in the core of the Centaurus galaxy cluster
Original language description
Galaxy clusters contain vast amounts of hot ionized gas known as the intracluster medium (ICM). In relaxed cluster cores, the radiative cooling time of the ICM is shorter than the age of the cluster. However, the absence of line emission associated with cooling suggests heating mechanisms that offset the cooling, with feedback from active galactic nuclei (AGNs) being the most likely source(1,2). Turbulence and bulk motions, such as the oscillating ('sloshing') motion of the core gas in the cluster potential well, have also been proposed as mechanisms for heat distribution from the outside of the core(3,4). Here we present X-ray spectroscopic observations of the Centaurus galaxy cluster with the X-Ray Imaging and Spectroscopy Mission satellite. We find that the hot gas flows along the line of sight relative to the central galaxy, with velocities from 130kms(-1) to 310kms(-1) within about 30kpc of the centre. This indicates bulk flow consistent with core gas sloshing. Although the bulk flow may prevent excessive accumulation of cooled gas at the centre, it could distribute the heat injected by the AGN and bring in thermal energy from the surrounding ICM. The velocity dispersion of the gas is found to be only less than or similar to 120kms(-1) in the core, even within about 10kpc of the AGN. This suggests that the influence of the AGN on the surrounding ICM motion is limited in the cluster.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
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)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature
ISSN
0028-0836
e-ISSN
1476-4687
Volume of the periodical
638
Issue of the periodical within the volume
8050
Country of publishing house
DE - GERMANY
Number of pages
14
Pages from-to
365-378
UT code for WoS article
001509637600001
EID of the result in the Scopus database
2-s2.0-85218495195