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The 2dF Galaxy Redshift Survey: The bias of galaxies and the density of the Universe

Abstract:

We compute the bispectrum of the 2dF Galaxy Redshift Survey (2dFGRS) and use it to measure the bias parameter of the galaxies. This parameter quantifies the strength of clustering of the galaxies relative to the mass in the Universe. By analysing 80 × 106 triangle configurations in the wavenumber range 0.1 < k < 0.5 h Mpc-1 (i.e. on scales roughly between 5 and 30 h-1 Mpc) we find that the linear bias parameter is consistent with unity: b1 = 1.04 ± 0.11, and the quadratic (non-linear) b...

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Journal:
Monthly Notices of the Royal Astronomical Society
Volume:
335
Issue:
2
Pages:
432-440
Publication date:
2002-09-11
DOI:
ISSN:
0035-8711
URN:
uuid:87262cec-0d14-45c3-be3e-7bc796473e67
Source identifiers:
159421
Local pid:
pubs:159421

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