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

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6dFGS Peculiar Velocities • Spectroscopic survey of southern sky (17,000 deg 2 ) • Primary sample from 2MASS with K tot < 12.75, also secondary samples with H < 13.0, J < 13.75, r < 15.6, b < 16.75 • Max z ~ 0.15 • 125,000 redshifts, 9000 FP peculiar velocities • <strong>Large</strong>st combined redshift and peculiar velocity survey by a factor of 2 01/18/2013 Morag I. Scrimgeour 44
• Optical widefield automated survey telescope at Siding Spring Observatory, Australia • Supernova Survey (Keller et al 2007): 01/18/2013 − 1250 deg 2 of sky − ~500 SNe per year − z
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 36 and 37: 01/18/2013 • Bulk Flow / dipole (
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 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

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