HORIZON RUN 3: TOPOLOGY AS A STANDARD RULER

We study the physically self-bound cold dark matter halo distribution, which we associate with the massive galaxies within Horizon Run 3, to estimate the accuracy of the determination of the cosmological distance scale measured by the topology analysis. We apply the routine "Contour 3D" to...

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Bibliographic Details
Published in:The Astrophysical journal 2015-02, Vol.799 (2), p.1-6
Main Authors: Speare, Robert, Gott, J Richard, Kim, Juhan, Park, Changbom
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BARYONS
CALIBRATION
COMPARATIVE EVALUATIONS
COSMOLOGY
DISTANCE
Estimates
GALAXIES
Horizon
NONLUMINOUS MATTER
OSCILLATIONS
RED SHIFT
Sky surveys (astronomy)
Smoothing
SPHERICAL CONFIGURATION
Three dimensional
THREE-DIMENSIONAL CALCULATIONS
TOPOLOGY
UNIVERSE
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Summary:We study the physically self-bound cold dark matter halo distribution, which we associate with the massive galaxies within Horizon Run 3, to estimate the accuracy of the determination of the cosmological distance scale measured by the topology analysis. We apply the routine "Contour 3D" to the 108 Mock Survey of [pi] steradians out to redshift z = 0.6, which effectively corresponds to the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) survey, and compare the topology with that of a Gaussian random phase field. We find that given three separate smoothing lengths [lambda] = 15, 21, and 34 h super(-1) Mpc, the least chi super(2) fit genus per unit volume (g) yields a 1.7% fractional uncertainty in smoothing length and angular diameter distance to z = 0.6. This is an improvement on former calibrations and presents an error estimate competitive with baryon acoustic oscillation scale techniques. We also present three-dimensional graphics of the Horizon Run 3 spherical mock survey to show a wealth of large-scale structures of the universe that are expected for surveys like BOSS.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/799/2/176