Reconstruction of the primordial density field from redshift and distance catalogs of galaxies

Details Reconstruction of the primordial density field from redshift and distance catalogs of galaxies Reconstruction of the primordial density field from redshift and distance catalogs of galaxies

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..285l&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Peculiar velocity reconstruction methods allow one to have a deeper insight into the distribution of dark matter: both to measure Ω_m and to characterize the primordial density fluctuations. We present here the Monge-Ampère-Kantorovitch method applied to redshift reconstruction. We show what are the limitations and the problems to overcome to prevent systematic errors. This leads for the first time to a good representation of the peculiar velocity field within a 8,000 km/s sphere. We measure Ω_m=0.237+0.063-0.056 using a catalog of distances within 3,000 km/s, which is in agreement with the analysis of WMAP and SDSS data.

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