Title:

The final 2dFGRS power spectrum
and cosmological implications



John Peacock
Royal Observatory Edinburgh



Abstract:

The 2dF Galaxy Redshift Survey published its final catalogue of 221,000
galaxies in 2003. Since then, a major effort has taken place in
understanding the calibration of the survey, resulting in final
statistical measurements of the power spectrum that are roughly twice as
accurate as the earlier work used by the WMAP team. The inferred matter
density parameter is lower than the common standard value of 0.3: we
obtain 0.24 +/- 0.02. Approximately 17% of the matter is in the form of
baryons, and the effect of acoustic oscillations in the baryon fluid can
be seen in the power spectrum. The statistical accuracy is sufficiently
good that differences between the clustering of mass and of galaxies must
now be modelled in detail.