Journal Article

Vector dark energy and high-<i>z</i> massive clusters

Edoardo Carlesi, Alexander Knebe, Gustavo Yepes, Stefan Gottlöber, Jose Beltrán Jiménez and Antonio L. Maroto

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 418, issue 4, pages 2715-2719
Published in print December 2011 | ISSN: 0035-8711
Published online December 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19660.x
Vector dark energy and high-z massive clusters

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The detection of extremely massive clusters at z > 1 such as SPT-CL J0546−5345, SPT-CL J2106−5844 and XMMU J2235.3−2557 has been considered by some authors as a challenge to the standard Λ cold dark matter cosmology. In fact, assuming Gaussian initial conditions, the theoretical expectation of detecting such objects is as low as ≤1 per cent. In this paper we discuss the probability of the existence of such objects in the light of the vector dark energy paradigm, showing by means of a series of N-body simulations that chances of detection are substantially enhanced in this non-standard framework.

Keywords: methods: numerical; galaxies: haloes; cosmology: theory; dark matter

Journal Article.  3587 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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