Searching for modified growth patterns with tomographic surveys
Name
Zhao-2009-Searching for modifi.pdf
Size
2.21 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Gong-Bo, Zhao
Pogosian, Levon
Silvestri, Alessandra
Zylberberg, Joel
Date Issued
April 2009
Journal
Physical Review D
Publisher
American Physical Society
Citation
Zhao, Gong-Bo et al. “Searching for modified growth patterns with tomographic surveys.” Physical Review D 79.8 (2009): 083513.(C) 2010 The American Physical Society.
Version
Final published version
Abstract
In alternative theories of gravity, designed to produce cosmic acceleration at the current epoch, the growth of large scale structure can be modified. We study the potential of upcoming and future tomographic surveys such as Dark Energy Survey (DES) and Large Synoptic Survey Telescope (LSST), with the aid of cosmic microwave background (CMB) and supernovae data, to detect departures from the growth of cosmic structure expected within general relativity. We employ parametric forms to quantify the potential time- and scale-dependent variation of the effective gravitational constant and the differences between the two Newtonian potentials. We then apply the Fisher matrix technique to forecast the errors on the modified growth parameters from galaxy clustering, weak lensing, CMB, and their cross correlations across multiple photometric redshift bins. We find that even with conservative assumptions about the data, DES will produce nontrivial constraints on modified growth and that LSST will do significantly better.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.79.083513
