Measuring large-scale structure with the 2dF Galaxy Redshift Survey

Details Measuring large-scale structure with the 2dF Galaxy Redshift Survey Measuring large-scale structure with the 2dF Galaxy Redshift Survey

2001-05-25

arxiv.org/abs/astro-ph/0105450v1

Astronomy and Astrophysics

Astrophysics

15 Pages; invited paper at the 20th Texas Symposium on Relativistic Astrophysics (Austin, December 2000)

Scientific paper

10.1007/10854354_63

The 2dF Galaxy Redshift Survey is the first to measure more than 100,000 redshifts. This allows precise measurements of many of the key statistical measures of galaxy clustering, in particular redshift-space distortions and the large-scale power spectrum. This paper presents the current 2dFGRS results in these areas. Redshift-space distortions are detected with a high degree of significance, confirming the detailed Kaiser distortion from large-scale infall velocities, and measuring the distortion parameter beta = 0.43 +/- 0.07. The power spectrum is measured to < 10% accuracy for k > 0.02 h Mpc^-1, and is well fitted by a CDM model with Omega_m h = 0.20 +/- 0.03 and a baryon fraction of 0.15 +/- 0.07.

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