University of Sussex
Browse
0102048.pdf (126.68 kB)

The effect of radiative cooling on scaling laws of X-ray groups and clusters

Download (126.68 kB)
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 Couchman
We 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Astrophysical Journal

ISSN

0004-637X

Publisher

American Astronomical Society

Issue

1

Volume

552

Page range

27-30

Department 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

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2016-11-17

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC