Estimating the Sunyaev - Zel'dovich signal from quasar hosts using a
  Halo Occupation Distribution based approach
  The Sunyaev-Zeldovich (SZ) effect is a spectral distortion in the Cosmic
Microwave Background (CMB), caused due to up-scattering of CMB photons by high
energy electron distributions. The largest SZ distortion in the CMB is caused
by the hot electrons present in the intra-cluster medium (ICM). However,
several other small scale astrophysical processes can also contribute to the SZ
distortion in the CMB.
  Analytic studies have shown that the interstellar (ISM) electron gas of the
host galaxy heated by quasar feedback can also cause substantial SZ effect. For
successful detection of the quasar feedback signal, the SZ signal from the
virialized gas in the host halos of quasars needs to be properly quantified. In
this dissertation work, I have estimated the SZ signal from quasar hosts using
analytic models of the virialized gas in the ICM/ISM. As a new extension to
existing work I have used the measured Halo Occupation Distribution properties
of quasar hosts. The results show that the average SZ signal from quasar hosts
decreases with redshift. This result is consist what what has been observed by
the Planck team.
  I have compared by calculations with the experimental results of Ruan et al.
(2015). While Ruan et al. (2015) claim their detection to be from quasar
feedback, I find that within the errors of my model, their detection can be
explained with halo signal alone, without introducing feedback.
