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Redshift drift test of exotic singularity universes

T. Denkiewicz, M. Dabrowski, C. J. A. P. Martins, P. E. Vielzeuf

Abstract
We discuss how dynamical dark energy universes with exotic singularities may be distinguished from the standard ΛCDM model on the basis of their redshift drift signal, for which measurements both in the acceleration phase and in the deep matter era will be provided by forthcoming astrophysical facilities. Two specific classes of exotic singularity models are studied: sudden future singularity models and finite scale factor singularity models. In each class we identify the models which can mimic ΛCDM and play the role of dark energy as well as models for which redshift drift signals are significantly different from ΛCDM and the test can differentiate between them.

Physical Review D
Volume 89, Page 083514_1
2014 April

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia