Shot noise in galaxy clustering: halo model approach and its cosmological implications

TYPEAstrophysics Seminar
Speaker:Dmitry Ginzburg
Time:14:30 - 15:30
Location:Lidow 620
Remark:Ph.D seminar

Shot noise is an important ingredient to any measurement of discrete tracers of the large
scale structure. Recent work has shown that shot noise in the halo power spectrum becomes
increasingly sub-Poissonian at high mass. Interestingly, while the halo model predicts a
shot noise power spectrum in qualitative agreement with the data, it leads to an unphysical
white noise in matter power spectra.
I will show how to resolve this issue and obtain meaningful predictions from the halo model,
which will be compared to measurements extracted from numerical simulations. In addition, I
will apply the Fisher matrix formalism to quantify the impact of systematic errors in shot
noise modelling on a measurement of relativistic projection effects and primordial