Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.251..600b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 251, Aug. 15, 1991, p. 600-627. Research supported by C
Astronomy and Astrophysics
Astronomy
242
Astronomical Polarimetry, Cosmology, Faint Objects, Galactic Clusters, Elliptical Galaxies, Image Resolution, Seeing (Astronomy)
Scientific paper
Inhomogeneity in the distribution of mass in the universe on scales less than about 100 Mpc can generate a coherent shear distortion or polarization of the images of background galaxies. A prescription is given for quantifying the galaxy distortion, and a propagation equation for its evolution in an inhomogeneous universe is derived. The creation of shear by inhomogeneity is illustrated using model kinematic universes comprising random distributions of point masses, spheres, and circular disks designed to simulate the superclusters, voids, and 'walls' reported in galaxy velocity surveys. Using these simulations, it is estimated that an rms induced ellipticity of p(rms) about 0.2 Omega (LSS) where Omega (LSS) is the fraction of the mass of the universe clustered on the large scale, will be produced. The angular correlation length is about 1.6 deg.
Blandford Roger. D.
Brainerd Tereasa G.
Saust Ann B.
Villumsen Jens Verner
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