Effects of biasing on the galaxy power spectrum at large scales

Understand

n this paper we study the effect of biasing on the power spectrum at large scales.

• We show that even though non-linear biasing does introduce a white noise contribution on large scales, the $P(k)\propto k^n$ behavior of the matter power spectrum on large scales may still be visible and above the white noise for about one decade.
• We show, that the Kaiser biasing scheme which leads to linear bias of the correlation function on {\em large} scales, also generates a linear bias of the {\rm power spectrum} on rather small scales.
• This is a consequence of the divergence on small scales of the pure Harrison-Zeldovich spectrum.