EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 367/1 Article
Free access article

Issue A&A
Volume 367, Number 1, February III 2001
Page(s) 18 - 26
Section Cosmology
DOI http://dx.doi.org/10.1051/0004-6361:20000406



A&A 367, 18-26 (2001)
DOI: 10.1051/0004-6361:20000406

Two-point correlation functions on the light cone: Testing theoretical predictions against $\vec N$-body simulations

T. Hamana1, S. Colombi1, 2 and Y. Suto3, 4

1  Institut d'Astrophysique de Paris, CNRS, 98bis Boulevard Arago, 75014 Paris, France
    e-mail: hamana@iap.fr; colombi@iap.fr
2  NIC (Numerical Investigations in Cosmology) Group, CNRS
3  Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
    e-mail: suto@phys.s.u-tokyo.ac.jp
4  Research Center for the Early Universe (RESCEU), School of Science, University of Tokyo, Tokyo 113-0033, Japan

(Received 5 July 2000 / Accepted 29 November 2000 )

Abstract
We examine the light-cone effect on the two-point correlation functions using numerical simulations for the first time. Specifically, we generate several sets of dark matter particle distributions on the light-cone up to z=0.4 and z=2 over the field-of-view of $\pi$ degree2 from cosmological N-body simulations. Then we apply the selection function to the dark matter distribution according to the galaxy and QSO luminosity functions. Finally we compute the two-point correlation functions on the light-cone both in real and in redshift spaces using the pair-count estimator and compare with the theoretical predictions. We find that the previous theoretical modeling for nonlinear gravitational evolution, linear and nonlinear redshift-distortion, and the light-cone effect including the selection function is in good agreement with our numerical results, and thus is an accurate and reliable description of the clustering in the universe on the light-cone.


Key words: cosmology: theory -- dark matter -- large-scale structure of universe -- galaxies: general -- quasars: general

Offprint request: T. Hamana




© ESO 2001


What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.