Large-scale homogeneity vs. small- scale inhomogeneity: testing ...

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01/18/2013 • Bulk Flow / dipole (Watkins et al. 2009, Nusser & Davis 2011): (σ 8, Ω m) • Angular power spectrum / spherical harmonics of velocity field (Haugbølle et al. 2007, Hannestad et al. 2008) (σ 8 , Ω m , Γ) Velocity field statistics I Watkins et al. (2009) Hannestad et al. (2008) Morag I. Scrimgeour 36
Velocity Field Statistics II • Velocity correlation function ξ vv (Gordon et al. 2007, Abate & Lahav 2008) (σ 8, Ω m, γ, H 0?) • 3D velocity power spectrum (Burkey & Taylor 2004) • Comparison with redshift surveys: δ-δ <strong>vs</strong>. v-v (β=f/b, γ) 01/18/2013 • Can cancel cosmic variance (e.g. McDonald & Seljak 2009) Abate & Lahav (2008) Morag I. Scrimgeour 37
Page 1 and 2: ICRAR is a partnership between the
Page 3 and 4: 01/18/2013 Testing large-scale cosm
Page 5 and 6: Inhomogeneity: alternative to Dark
Page 7 and 8: • So far, results are conflicting
Page 9 and 10: Fractal (correlation) dimension D 2
Page 11 and 12: 01/18/2013 Selection Function Corre
Page 13 and 14: • In ΛCDM expect: − Small scal
Page 15 and 16: How do we define the “homogeneity
Page 17 and 18: 01/18/2013 0.3
Page 19 and 20: 01/18/2013 0.7
Page 21 and 22: 01/18/2013 ΛCDM D 2(r) model: effe
Page 23 and 24: Scrimgeour et al. (2012) 01/18/2013
Page 25 and 26: • WiggleZ measurement of homogene
Page 27 and 28: 01/18/2013 What are peculiar veloci
Page 29 and 30: 01/18/2013 Large-scale Dark Matter
Page 32 and 33: • Nature of dark energy − Expan
Page 34 and 35: • Nature of dark energy Peculiar
Page 38 and 39: Bulk flows and dark flows: a proble
Page 40 and 41: 01/18/2013 Conflicting σ 8 constra
Page 42 and 43: 01/18/2013 Several potential system
Page 44 and 45: 6dFGS Peculiar Velocities • Spect
Page 46 and 47: ~500 Type Ia SNe over 5 years (Scri
Page 48 and 49: 01/18/2013 Bulk flow distribution
Page 50 and 51: 01/18/2013 True bulk flow The ‘re
Page 52 and 53: 01/18/2013 True bulk flow Observed
Page 54 and 55: 01/18/2013 Bulk Flow Systematics fr
Page 56 and 57: N(z) 01/18/2013 4000 3500 3000 2500
Page 58: Homogeneity in the WiggleZ Survey S

Large-scale homogeneity vs. small- scale inhomogeneity: testing ...

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