Beyond boundaries of redshift surveys: assessing mass fluctuations on '''super-survey'' scales

Journal Article · Sun Dec 01 00:00:00 EST 2013 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2013/12/027· OSTI ID:22369859

Feix, Martin; Nusser, Adi ^[1]

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1. Department of Physics and the Asher Space Science Institute, Israel Institute of Technology - Technion, Haifa 32000 (Israel)

The observed density field in redshift space is directly affected by the radial motions generated from mass fluctuations outside the volume occupied by a given galaxy redshift survey. These motions introduce redshift space anisotropies which are more pronounced at larger distances from the survey's center, thus offering clues to the nature of mass fluctuations on super-survey scales. Furthermore, we note that all estimates of the growth factor derived from redshift space distortions are based on relations which explicitly assume that the velocity field is generated by mass fluctuations inside the survey volume. This may cause uncertainties in these estimates which are on the order of a few percent.

• OSTI ID: 22369859
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 12; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ANISOTROPY
DENSITY
DISTANCE
FLUCTUATIONS
GALAXIES
MASS
RED SHIFT
SPACE
VELOCITY