Rights statement: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record 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 A. Thomas, Pedro T. P. Viana, Harry Wilcox; The XMM Cluster Survey: evolution of the velocity dispersion–temperature relation over half a Hubble time. MNRAS 2016; 463 (1): 413-428. doi: 10.1093/mnras/stw1947 is available online at:https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stw1947
Accepted author manuscript, 2.63 MB, PDF document
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
| <mark>Journal publication date</mark> | 21/11/2016 |
|---|---|
| <mark>Journal</mark> | Monthly Notices of the Royal Astronomical Society |
| Issue number | 1 |
| Volume | 463 |
| Number of pages | 16 |
| Pages (from-to) | 413-428 |
| Publication Status | Published |
| Early online date | 4/08/16 |
| <mark>Original language</mark> | English |
We measure the evolution of the velocity dispersion-temperature (sigma(v)-T-X) 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 (sigma(v) alpha 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.