Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-30
Mon.Not.Roy.Astron.Soc. 331 (2002) 556
Astronomy and Astrophysics
Astrophysics
14 pages, 10 figures. Submitted to MNRAS. Figs. 4 and 5 are bitmapped versions of the full resolution figures which can be fou
Scientific paper
10.1046/j.1365-8711.2002.05039.x
We show how future measurements of the SZ effect (SZE) can be used to constrain the cosmological parameters. We combine the SZ information expected from the Planck full-sky survey, N(S), where no redshift information is included, with the N(z) obtained from an optically-identified SZ-selected survey covering less than 1% of the sky. We demonstrate how with a small subsample (approx. 300 clusters) of the whole SZ catalogue observed optically it is possible to drastically reduce the degeneracy among the cosmological parameters. We have studied the requirements for performing the optical follow-up and we show the feasibility of such a project. Finally we have compared the cluster expectations for Planck with those expected for Newton-XMM during their lifetimes. It is shown that, due to its larger sky coverage, Planck will detect a factor approx. 5 times more clusters than Newton-XMM and also with a larger redshift coverage.
Benítez Narciso
Diego Jose Maria
Luis Sanz José
Martinez-Gonzalez Enrique
Silk Joseph
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