Nature versus nurture: the curved spine of the galaxy cluster X‐ray luminosity–temperature relation

Hartley, W G, Gazzola, L, Pearce, F R, Kay, S T and Thomas, P A (2008) Nature versus nurture: the curved spine of the galaxy cluster X‐ray luminosity–temperature relation. Monthly Notices of the Royal Astronomical Society, 386 (4). pp. 2015-2021. ISSN 0035-8711

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Abstract

The physical processes that define the spine of the galaxy cluster X‐ray luminosity–temperature (L–T) relation are investigated using a large hydrodynamical simulation of the universe. This simulation models the same volume and phases as the millennium simulation and has a linear extent of 500 h−1 Mpc. We demonstrate that mergers typically boost a cluster along but also slightly below the L–T relation. Due to this boost, we expect that all of the very brightest clusters will be near the peak of a merger. Objects from near the top of the L–T relation tend to have assembled much of their mass earlier than an average halo of similar final mass. Conversely, objects from the bottom of the relation are often experiencing an ongoing or recent merger.

Item Type: Article
Keywords: hydrodynamics - methods: numerical - cosmology: theory.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy
Depositing User: Sarah Pelling
Date Deposited: 03 Oct 2008
Last Modified: 08 May 2018 02:56
URI: http://sro.sussex.ac.uk/id/eprint/1924

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