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Fig. 13


Effect of intrinsic alignments on the angular power spectra. Top panel: The black line shows the GG power spectrum, while blue and red lines show the GI and II power spectra, respectively. Solid lines show the linear alignment model with no small-scale intrinsic alignments, while dashed and dotted lines model the contribution of satellite galaxies with as in Schneider & Bridle (2010) and with the mass-dependent 2σ upper limit on the alignment signal derived in this work (see Sect. ), respectively. Grey boxes with black circles show the expected uncertainty levels on a KiDS-like survey covering 1500 sq. deg and with ngal = 10 arcmin-2. Bottom panel: ratio between the GI and II power spectra and the GG power spectrum, for each model. The shaded region shows values above the 1σ uncertainties in the anglar power spectrum for a KiDS-like survey, where GI and II contributions would dominate over statistical uncertainties.

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