Zusammenfassung
In this paper we show how effects from small scales enter the
angular-redshift power spectrum $C_\ell(z,z')$. In particular, we show that
spectroscopic surveys with high redshift resolution are affected by small
scales already on large angular scales, i.e. at low multipoles. Therefore, when
considering the angular power spectrum with spectroscopic redshift resolution,
it is important to account for non-linearities relevant on small scales even at
low multipoles. This may also motivate the use of the correlation function
instead of the angular power spectrum. These effects, which are very relevant
for bin auto-correlations, but not so important for cross-correlations, are
quantified in detail.
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