CMB: Sound Waves in the Early Universe
CMB: Sound Waves in the Early Universe
CMB: Sound Waves in the Early Universe
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Constra<strong>in</strong>ts<br />
€<br />
Galaxy pair with separations Δz, Δθ :<br />
Δr c<br />
= cΔz /H(z) radial comov<strong>in</strong>g separation<br />
Δr c<br />
= Δθ(1+ z)d A<br />
angular comov<strong>in</strong>g separation<br />
Spherically averaged correlation<br />
function probes<br />
⎡<br />
D V<br />
(z) = ⎢ (1+ z) 2 d 2 A<br />
(z)<br />
⎣<br />
cz ⎤<br />
⎥<br />
H(z) ⎦<br />
1/ 3<br />
SDSS : D V<br />
(z = 0.35) =1370 ± 64 Mpc<br />
R 0.35<br />
= D V<br />
(0.35) /d A<br />
(z LS<br />
) = 0.0979 ± 0.0036<br />
A = D V<br />
(0.35)<br />
Ω m<br />
H 0<br />
2<br />
0.35c = 0.469 ± 0.017 Eisenste<strong>in</strong> etal 2005<br />
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