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Subject of this paper is the weak lensing effect on galaxies that showintrinsically correlated ellipticities. In our model, we investigate thedistortion of the ellipticity field if the galaxies experience an apparentshift in their position by weak lensing deflection and compare this effect tothe shearing effect induced by tidal fields. Starting with a derivation ofintrinsic ellipticity spectra by employing a tidal torquing model generatinggalactic angular momenta, we model the galaxy ellipticity by assuming that thegalactic disk forms perpendicularly to the host halo angular momentum directionand derive intrinsic ellipticity E-mode and B-mode spectra from the angularmomentum statistics. The lensing effect on the ellipticity field is modeled byemploying the methodology developed in the framework of lensing of the cosmicmicrowave background polarisation. For EUCLID, ellipticity correlations arealtered by lensing deflection on multipoles l>1000 by ~5% for the ellipticityE-modes and by ~30% for the B-modes, while a shallower survey would exhibitlarger changes on larger angular scales. In addition to the convolving effectof lensing on the ellipticity spectra we investigate the E/B-mode conversion,and discuss the possibility of measuring correlations between differentmultipoles which is evoked by the homogeneity breaking effect of the lensingdisplacement. Our conclusion is that although shape correlations generated byweak gravitational shear is dominant, the shifting effect due to lensing isshaping the ellipticity spectra on small angular scales and causes a number ofinteresting phenomena, which might be observable by future surveys.

Weak gravitational lensing of intrinsically aligned galaxies