Void bias from primordial non-Gaussianities

Understand

We study how primordial non-Gaussianities affect the clustering of voids at large scales.

• We derive a formula of the bias of voids induced from the non-Gaussianities by making use of the functional integral method.
• In a similar way as of haloes, we find that primordial non-Gaussianities can generate scale-dependence in the bias of voids at large scales.
• In addition, we show that by observing the cross power spectrum of voids and haloes we could check the consistency relation between the non-linearity parameters f_NL and tau_NL.