Planck priors for dark energy surveys

Mukherjee, Pia, Kunz, Martin, Parkinson, David and Wang, Yun (2008) Planck priors for dark energy surveys. Physical Review D, 78 8: 083529-1-083529-8. doi:10.1103/PhysRevD.78.083529

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Author Mukherjee, Pia
Kunz, Martin
Parkinson, David
Wang, Yun
Title Planck priors for dark energy surveys
Journal name Physical Review D   Check publisher's open access policy
ISSN 1550-7998
Publication date 2008-10-15
Sub-type Article (original research)
DOI 10.1103/PhysRevD.78.083529
Open Access Status File (Publisher version)
Volume 78
Issue 8
Start page 083529-1
End page 083529-8
Total pages 8
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
Although cosmic microwave background anisotropy data alone cannot constrain simultaneously the spatial curvature and the equation of state of dark energy, CMB data provide a valuable addition to other experimental results. However computing a full CMB power spectrum with a Boltzmann code is quite slow; for instance if we want to work with many dark energy and/or modified gravity models, or would like to optimize experiments where many different configurations need to be tested, it is possible to adopt a quicker and more efficient approach. In this paper we consider the compression of the projected Planck cosmic microwave background data into four parameters, R (scaled distance to last scattering surface), la (angular scale of sound horizon at last scattering), Ωbh2 (baryon density fraction) and ns (powerlaw index of primordial matter power spectrum), all of which can be computed quickly. We show that, although this compression loses information compared to the full likelihood, such information loss becomes negligible when more data is added. We also demonstrate that the method can be used for canonical scalar-field dark energy independently of the parametrization of the equation of state, and discuss how this method should be used for other kinds of dark energy models.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # 083529

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 20 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 19 times in Scopus Article | Citations
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Created: Mon, 28 Feb 2011, 09:46:03 EST