WHR15b.pdf (2.94 MB)
The XMM Cluster Survey: evolution of the velocity dispersion–temperature relation over half a Hubble time
journal contribution
posted on 2023-06-09, 03:11 authored by Susan Wilson, Matt Hilton, Philip J Rooney, Caroline Caldwell, Scott T Kay, Chris A Collins, Ian G McCarthy, A Kathy Romer, Alberto Bermeo, Rebecca Bernstein, Luiz da Costa, Daniel Gifford, Devon Hollowood, Ben Hoyle, Tesla Jeltema, Andrew R Liddle, Marcio A G Maia, Robert G Mann, Julian A Mayers, Nicola Mehrtens, Christopher J Miller, Robert C Nichol, Ricardo Ogando, Martin Sahlén, Benjamin Stahl, John P Stott, Peter ThomasPeter Thomas, Pedro T P Viana, Harry WilcoxWe measure the evolution of the velocity dispersion–temperature (sv–TX) relation up to z = 1 using a sample of 38 galaxy clusters drawn from the XMM Cluster Survey. This work improves upon previous studies by the use of a homogeneous cluster sample and in terms of the number of high-redshift clusters included. We present here new redshift and velocity dispersion measurements for 12 z > 0.5 clusters observed with the Gemini Multi Object Spectographs instruments on the Gemini telescopes. Using an orthogonal regression method,we find that the slope of the relation is steeper than that expected if clusters were self-similar, and that the evolution of the normalization is slightly negative, but not significantly different from zero (sv ?T0.86±0.14E(z)-0.37±0.33). We verify our results by applying our methods to cosmological hydrodynamical simulations. The lack of evolution seen in our data is consistent with simulations that include both feedback and radiative cooling.
Funding
Astrophysics and Cosmology - Sussex Consolidated Grant; G1291; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/L000652/1
History
Publication status
- Published
File Version
- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
1Volume
463Page range
413-428Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Astronomy Centre Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-09-29First Open Access (FOA) Date
2016-09-29First Compliant Deposit (FCD) Date
2016-09-29Usage metrics
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