2001/07/31 by Maurício O. Calvão, M. O. Calvao, J. R. T. de Mello Neto +1 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.1103/physrevlett.88.091302
published as Phys.Rev.Lett. 88 (2002) 091302 · Revised version accepted for publication in Phys. Rev. Lett., title changed, 4 pages, 3 eps figures, RevTeX
arxiv created 2002/01/24 · openalex publication_date 2002/02/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show through Monte Carlo simulations that the Alcock-Paczy\ifmmode \acuten\else 'n\fiski test, as applied to quasar clustering, is a powerful tool to probe the cosmological density and equation of state parameters \ensuremathΩm0, \ensuremathΩx0, and w. By taking into account the effect of peculiar velocities upon the correlation function we obtain for the Two-Degree Field QSO Redshift Survey the predicted confidence contours for the cosmological constant (w\phantom\rule0ex0ex=\phantom\rule0ex0ex\ensuremath-1) and spatially flat (\ensuremathΩm0+\ensuremathΩx0\phantom\rule0ex0ex=\phantom\rule0ex0ex1) cases. For w\phantom\rule0ex0ex=\phantom\rule0ex0ex\ensuremath-1, the test is especially sensitive to the difference \ensuremathΩm0\ensuremath-\ensuremathΩ_\ensuremathΛ0, thus being ideal to combine with cosmic microwave background results. For the flat case, it is competitive with future supernova and galaxy number count tests, besides being complementary to them.