Forecasting cosmological parameter constraints from near-future space-based galaxy surveys

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dc.contributor.author Pavlov, Anatoly
dc.contributor.author Samushia, Lado
dc.contributor.author Ratra, Bharat V.
dc.date.accessioned 2013-02-20T19:21:23Z
dc.date.available 2013-02-20T19:21:23Z
dc.date.issued 2013-02-20
dc.identifier.uri http://hdl.handle.net/2097/15313
dc.description.abstract The next generation of space-based galaxy surveys is expected to measure the growth rate of structure to a level of about one percent over a range of redshifts. The rate of growth of structure as a function of redshift depends on the behavior of dark energy and so can be used to constrain parameters of dark energy models. In this work, we investigate how well these future data will be able to constrain the time dependence of the dark energy density. We consider parameterizations of the dark energy equation of state, such as XCDM and ωCDM, as well as a consistent physical model of time-evolving scalar field dark energy, φCDM.We show that if the standard, specially flat cosmological model is taken as a fiducial model of the universe, these near-future measurements of structure growth will be able to constrain the time dependence of scalar field dark energy density to a precision of about 10%, which is almost an order of magnitude better than what can be achieved from a compilation of currently available data sets. en_US
dc.language.iso en_US en_US
dc.relation.uri http://iopscience.iop.org/0004-637X/760/1/19/ en_US
dc.rights This is an author-created, un-copyedited version of an article accepted for publication in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at http://iopscience.iop.org/0004-637X/760/1/19/ . en_US
dc.subject Cosmological parameters en_US
dc.subject Dark energy en_US
dc.subject Large-scale structure of universe en_US
dc.title Forecasting cosmological parameter constraints from near-future space-based galaxy surveys en_US
dc.type Article (author version) en_US
dc.date.published 2012 en_US
dc.citation.doi doi:10.1088/0004-637X/760/1/19 en_US
dc.citation.issue 1 en_US
dc.citation.jtitle Astrophysical Journal en_US
dc.citation.spage 19 en_US
dc.citation.volume 760 en_US
dc.contributor.authoreid ratra en_US


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