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Constraining cosmic expansion and gravity with galaxy redshift surveys

Title
Constraining cosmic expansion and gravity with galaxy redshift surveys
Authors
Daniel S.F.Linder E.V.
Ewha Authors
Eric V. Linder
Issue Date
2013
Journal Title
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516JCR Link
Citation
vol. 2013, no. 2
Indexed
SCIE; SCOPUS WOS scopus
Abstract
We analyze the science reach of a next generation galaxy redshift survey such as BigBOSS to fit simultaneously for time varying dark energy equation of state and time- and scale-dependent gravity. The simultaneous fit avoids potential bias from assuming ΛCDM expansion or general relativity and leads to only modest degradation in constraints. Galaxy bias, fit freely in redshift bins, is self calibrated by spectroscopic measurements of redshift space distortions and causes little impact. The combination of galaxy redshift, cosmic microwave background, and supernova distance data can deliver 5-10% constraints on 6 model independent modified gravity quantities.© 2013 IOP Publishing Ltd and Sissa Medialab srl.
DOI
10.1088/1475-7516/2013/02/007
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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