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  • 1512.02800v2

    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

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The XMM cluster survey: evolution of the velocity dispersion-temperature relation over half a Hubble time

Research output: Contribution to journalJournal articlepeer-review

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  • Susan Wilson
  • 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 Sahlen
  • Benjamin Stahl
  • Pedro T. P. Viana
  • Harry Wilcox
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<mark>Journal publication date</mark>21/11/2016
<mark>Journal</mark>Monthly Notices of the Royal Astronomical Society
Issue number1
Volume463
Number of pages16
Pages (from-to)413-428
Publication StatusPublished
Early online date4/08/16
<mark>Original language</mark>English

Abstract

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.

Bibliographic note

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