High-redshift standard candles: Predicted cosmological constraints

King, Anthea L., Davis, Tamara M., Denney, K. D., Vestergaard, M. and Watson, D. (2014) High-redshift standard candles: Predicted cosmological constraints. Monthly Notices of the Royal Astronomical Society, 441 4: 3454-3476. doi:10.1093/mnras/stu793

Author King, Anthea L.
Davis, Tamara M.
Denney, K. D.
Vestergaard, M.
Watson, D.
Title High-redshift standard candles: Predicted cosmological constraints
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 1365-2966
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1093/mnras/stu793
Open Access Status
Volume 441
Issue 4
Start page 3454
End page 3476
Total pages 23
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2015
Language eng
Abstract We investigate whether future measurements of high-redshift standard candles will be a powerful probe of dark energy, when compared to other types of planned dark energy measurements. Active galactic nuclei, gamma-ray bursts, and certain types of core collapse supernova have been proposed as potential candidates of such a standard candle. Due to their high luminosity, they can be used to probe unexplored regions in the expansion history of the Universe. Information from these regions can help constrain the properties of dark energy, and in particular, whether it varies over time. We consider both linear and piecewise parameterizations of the dark energy equation of state, w(z), and assess the optimal redshift distribution that a highredshift standard-candle survey could take to constrain these models. The more general the form of the dark energy equation of state w(z) being tested, the more useful high-redshift standard candles become. For a linear parametrization of w(z), they give only small improvements over planned supernova and baryon acoustic oscillation measurements; a wide redshift range with many low-redshift points is optimal to constrain this linear model. However, to constrain a general, and thus potentially more informative, form of w(z), having many high-redshift standard candles can significantly improve limits on the nature of dark energy, even compared to dark energy experiments currently only in the planning stages.
Keyword Cosmological parameters
Dark energy
Quasars: general
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
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