Table 6
Range of possible cosmological parameter biases due to intrinsic alignments for a CFHTLS-like cosmic shear survey.
| Parameter | σ stat | Sample set (1) | Sample set (2) | Sample set (3) | Sample set (4) | ||||
| 1σ | 2σ | 1σ | 2σ | 1σ | 2σ | 1σ | 2σ | ||
|
|
|||||||||
| Ωm | 0.06 | 0.10 | 0.44 | 0.10 | 0.37 | 0.05 | 0.08 | 0.03 | 0.05 |
| σ 8 | 0.11 | 0.11 | 0.53 | 0.11 | 0.42 | 0.03 | 0.06 | 0.02 | 0.04 |
| w 0 | 0.62 | 0.49 | 2.84 | 0.46 | 2.40 | 0.40 | 0.75 | 0.24 | 0.37 |
Notes. We have listed the 1σ statistical error σstat, resulting from the Fisher matrix analysis after marginalising over all remaining parameters, in the second column, as well as the range of biases we obtained by sampling from the 1σ and 2σ confidence regions in the parameter space spanned by {A,β,ηother}. In the third to sixth columns results from the fits to four sets of galaxy samples, which are also shown in Fig. 18, are given. These sets are (1) the combined SDSS LRG samples; (2) SDSS LRG and SDSS Main L4 and L3 samples combined; (3) SDSS LRG and MegaZ-LRG samples combined; and (4) SDSS LRG, MegaZ-LRG, and the SDSS Main L4 and L3 samples combined. The range of biases is defined as the interval containing 99% of the distribution of biases (29).
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