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The effect of radiative cooling on scaling laws of X-ray groups and clusters
journal contribution
posted on 2023-06-08, 05:14 authored by O Muanwong, Peter ThomasPeter Thomas, S T Kay, F R Pearce, H M P CouchmanWe have performed cosmological simulations in a ?CDM cosmology with and without radiative cooling in order to study the effect of cooling on the cluster scaling laws. Our simulations consist of 4.1 million particles each of gas and dark matter within a box size of 100 h-1 Mpc, and the run with cooling is the largest of its kind to have been evolved to z = 0. Our cluster catalogs both consist of over 400 objects and are complete in mass down to ~1013 h-1 M?. We contrast the emission-weighted temperature-mass (Tew-M) and bolometric luminosity-temperature (Lbol-Tew) relations for the simulations at z = 0. We find that radiative cooling increases the temperature of intracluster gas and decreases its total luminosity, in agreement with the results of Pearce et al. Furthermore, the temperature dependence of these effects flattens the slope of the Tew-M relation and steepens the slope of the Lbol-Tew relation. Inclusion of radiative cooling in the simulations is sufficient to reproduce the observed X-ray scaling relations without requiring excessive nongravitational energy injection.
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- Published
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- Published version
Journal
Astrophysical JournalISSN
0004-637XPublisher
American Astronomical SocietyExternal DOI
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1Volume
552Page range
27-30Department affiliated with
- Physics and Astronomy Publications
Notes
Muanwong was a postgraduate student and Thomas was her supervisor. Kay was a PDRA and Pearce and Couchman collaborators who helped to undertake the simulations. . (85 citations)Full text available
- Yes
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- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-17Usage metrics
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