Figure 9:
Temperature fluctuations (
) in the CMBR due to the primary
Sachs-Wolfe
(SW) effect and secondary
integrated SW, Doppler, and Thomson scattering effects in
a critically
closed model. The top two plates
are results with no reionization and baryon fractions
0.02 (plate
1,
,
), and 0.2 (plate 2,
,
).
The bottom two plates are results
from an ”early and gradual” reionization scenario of
decaying
neutrinos with baryon fraction 0.02
(plate 3,
,
; and plate 4,
,
). If reionization occurs, the
scattering probability increases and
anisotropies are damped with each
scattering event. At the same time, matter structures
develop large
bulk motions relative to the
comoving background and induce Doppler shifts on the CMB.
The imprint
of this effect from last scattering
can be a significant fraction of primary
anisotropies.
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