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Variable sound speed in interacting dark energy models

Research output: Contribution to journalArticlepeer-review

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Variable sound speed in interacting dark energy models. / Linton, Mark S.; Pourtsidou, Alkistis; Crittenden, Robert; Maartens, Roy.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2018, No. 04, 043, 16.04.2018.

Research output: Contribution to journalArticlepeer-review

Harvard

Linton, MS, Pourtsidou, A, Crittenden, R & Maartens, R 2018, 'Variable sound speed in interacting dark energy models', Journal of Cosmology and Astroparticle Physics, vol. 2018, no. 04, 043. https://doi.org/10.1088/1475-7516/2018/04/043

APA

Vancouver

Linton MS, Pourtsidou A, Crittenden R, Maartens R. Variable sound speed in interacting dark energy models. Journal of Cosmology and Astroparticle Physics. 2018 Apr 16;2018(04). 043. https://doi.org/10.1088/1475-7516/2018/04/043

Author

Linton, Mark S. ; Pourtsidou, Alkistis ; Crittenden, Robert ; Maartens, Roy. / Variable sound speed in interacting dark energy models. In: Journal of Cosmology and Astroparticle Physics. 2018 ; Vol. 2018, No. 04.

Bibtex

@article{720d767eddd945acaaf587c1c5f6720c,
title = "Variable sound speed in interacting dark energy models",
abstract = " We consider a self-consistent and physical approach to interacting dark energy models described by a Lagrangian, and identify a new class of models with variable dark energy sound speed. We show that if the interaction between dark energy in the form of quintessence and cold dark matter is purely momentum exchange this generally leads to a dark energy sound speed that deviates from unity. Choosing a specific sub-case, we study its phenomenology by investigating the effects of the interaction on the cosmic microwave background and linear matter power spectrum. We also perform a global fitting of cosmological parameters using CMB data, and compare our findings to ΛCDM. ",
keywords = "astro-ph.CO, RCUK, STFC, ST/N000668/1",
author = "Linton, {Mark S.} and Alkistis Pourtsidou and Robert Crittenden and Roy Maartens",
year = "2018",
month = apr,
day = "16",
doi = "10.1088/1475-7516/2018/04/043",
language = "English",
volume = "2018",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing",
number = "04",

}

RIS

TY - JOUR

T1 - Variable sound speed in interacting dark energy models

AU - Linton, Mark S.

AU - Pourtsidou, Alkistis

AU - Crittenden, Robert

AU - Maartens, Roy

PY - 2018/4/16

Y1 - 2018/4/16

N2 - We consider a self-consistent and physical approach to interacting dark energy models described by a Lagrangian, and identify a new class of models with variable dark energy sound speed. We show that if the interaction between dark energy in the form of quintessence and cold dark matter is purely momentum exchange this generally leads to a dark energy sound speed that deviates from unity. Choosing a specific sub-case, we study its phenomenology by investigating the effects of the interaction on the cosmic microwave background and linear matter power spectrum. We also perform a global fitting of cosmological parameters using CMB data, and compare our findings to ΛCDM.

AB - We consider a self-consistent and physical approach to interacting dark energy models described by a Lagrangian, and identify a new class of models with variable dark energy sound speed. We show that if the interaction between dark energy in the form of quintessence and cold dark matter is purely momentum exchange this generally leads to a dark energy sound speed that deviates from unity. Choosing a specific sub-case, we study its phenomenology by investigating the effects of the interaction on the cosmic microwave background and linear matter power spectrum. We also perform a global fitting of cosmological parameters using CMB data, and compare our findings to ΛCDM.

KW - astro-ph.CO

KW - RCUK

KW - STFC

KW - ST/N000668/1

U2 - 10.1088/1475-7516/2018/04/043

DO - 10.1088/1475-7516/2018/04/043

M3 - Article

VL - 2018

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 04

M1 - 043

ER -

ID: 10093375