Abstract / Description of output
We measure the evolution of the velocity dispersion-temperature
(σv-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 GMOS 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 normalisation is slightly
negative, but not significantly different from zero
(σv∝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.
Original language | English |
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Pages (from-to) | 413-428 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 463 |
Issue number | 1 |
Early online date | 4 Aug 2016 |
DOIs | |
Publication status | Published - 21 Nov 2016 |
Keywords / Materials (for Non-textual outputs)
- galaxies: clusters: general
- galaxies: clusters: intracluster medium
- galaxies: distances and redshifts
- X-rays: galaxies: clusters
- cosmology: miscellaneous