Table 2
Recent measurements of H(z)/(1 + z).
| z | H(z)/(1 + z) | Method | Reference |
| km s-1 Mpc-1 | |||
|
|
|||
| 2.3 | 66.5 ± 7.4 | BAO | this work |
| 2.3 | 67.8 ± 2.4 | BAO+WMAP7 | this work |
| 0.35 | 60.8 ± 3.6 | BAO | Chuang & Wang (2012) |
| 0.35 | 62.5 ± 5.2 | BAO | Xu et al. (2012) |
| 0.57 | 58.8 ± 2.9 | BAO + AP | Reid et al. (2012) |
| 0.44 | 57.4 ± 5.4 | BAO + AP | Blake et al. (2012) |
| 0.60 | 54.9 ± 3.8 | ||
| 0.73 | 56.2 ± 4.0 | ||
| 0.2 | (1.11 ± 0.17)H0 | AP + SN | Blake et al. (2011b) |
| 0.4 | (0.83 ± 0.13)H0 | ||
| 0.6 | (0.81 ± 0.08)H0 | ||
| 0.8 | (0.83 ± 0.10)H0 | ||
| 0 | 73.8 ± 2.5 | Riess et al. (2011) | |
Notes. The BAO-based measurements use rs = 152.76 Mpc as the standard of length and are shown as the filled circles in Fig. 21. The quoted uncertainties in H(z) do not include uncertainties in rs which are expected to be negligible, ≈1% (Komatsu et al. 2011). The measurements of Blake et al. (2011b) use supernova data and therefore measure H(z) relative to H0. We quote the results they obtain without assuming a flat universe and plot them as the open green circles in Fig. 21 assuming h = 0.7.
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