Phys. Rev. Lett. 88, 091302 (2002) [4 pages]Probing the Dark Energy with Quasar Clustering |
M. O. Calvão, J. R. T. de Mello Neto, and I. Waga
Universidade Federal do Rio de Janeiro, Instituto de Física, CEP 21945-970 Rio de Janeiro, RJ, Brazil
See Also: Erratum
Received 11 July 2001; revised 9 October 2001; published 15 February 2002
We show through Monte Carlo simulations that the Alcock-Paczyński test, as applied to quasar clustering, is a powerful tool to probe the cosmological density and equation of state parameters Ωm0, Ωx0, 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 = -1) and spatially flat (Ωm0+Ωx0 = 1) cases. For w = -1, the test is especially sensitive to the difference Ωm0-ΩΛ0, 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.
©2002 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v88/e091302
DOI: 10.1103/PhysRevLett.88.091302
PACS: 98.80.Es, 95.35.+d, 98.54.Aj, 98.62.Py
See Also
Erratum: M. O. Calvão, J. R. de Mello Neto, and I. Waga, Erratum: Probing the Dark Energy with Quasar Clustering [Phys. Rev. Lett. 88, 091302 (2002)], Phys. Rev. Lett. 90, 069901 (2003)
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