Slides of 5 lectures at XV Brazilian School on Cosmology and ...

Tracker solution limitParameters ǫ i and f vi should be restricted by powerspectrum <strong>at</strong> last sc<strong>at</strong>tering, e.g.,( ) ( )δρ δρ= f vi ∼ −10 −6 to − 10 −5ρ ρHi viE.g., f vi ∼ 10 −3 , (δρ/ρ) vi ∼ −10 −3 ; or f vi ∼ −10 −2 ,(δρ/ρ) vi ∼ −10 −4 ; or f vi ∼ 3 × 10 −3 , (δρ/ρ) vi ∼ −3 × 10 −3 .The general solution possesses a tracking limit,equivalent to the exact solution with ǫ i = 0, t ǫ = 0, witha v = a v0 t (i.e., voids expand like Milne solution in t)Tracker reached within 1% by redshift z ∼ 37 forreasonable priorsEffectively, there are only two free parameters15th <strong>Brazilian</strong> <strong>School</strong> on Cosmology and Gravit<strong>at</strong>ion, August 2012 – p.59/143