https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44621 cz < 10 000 km s⁻¹ with a mean velocity of 4805 km s⁻¹. The main update in this release is the replacement of some archival HI data with newer ALFALFA data. Using the 2MTF template relation, we calculate the distances and peculiar velocities of all 2MTF galaxies. The mean uncertainties of the linear distance measurements are around 22 per cent in all three infrared bands. 2MTF measurements agree well with the distances from the Cosmicflows-3 compilation, which contains 1117 common galaxies, including 28 with SNIa distance measurements. Using distances estimated from the ‘3-bands combined’ 2MTF sample and a χ² minimization method, we find best-fitting bulk flow amplitudes of 308 ± 26 km s⁻¹, 318 ± 29 km s⁻¹, and 286 ± 25 km s⁻¹ at depths of R_I = 20, 30 and 40 h⁻¹ Mpc, respectively, which is consistent with the CDM model and with previous 2MTF results with different estimation techniques and a preliminary catalogue.]]> Tue 18 Oct 2022 10:57:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34022 −1 without the need to smooth or grid the data. Our fitting methods are validated using a set of simulated 2MTF surveys. Using these simulations we also identify that the Gaussian distributed estimator for peculiar velocities of Watkins & Feldman is suitable for measuring the velocity power spectrum, but sub-optimal for the 2MTF data compared to using magnitude fluctuations δm, and that, whilst our fits are robust to a change in fiducial cosmology, future peculiar velocity surveys with more constraining power may have to marginalize over this. We obtain scale-dependent constraints on the growth rate of structure in two bins, finding fσ₈ = [0.55^+0.16_−0.13,0.40^+0.16_−0.17] in the ranges k = [0.007–0.055, 0.55–0.150] h Mpc⁻¹. We also find consistent results using four bins. Assuming scale-independence we find a value fσ₈ = 0.51^+0.09_−0.08⁠, a ∼16 per cent measurement of the growth rate. Performing a consistency check of general relativity (GR) and combining our results with cosmic microwave background data only we find γ = 0.45^+0.10_−0.11⁠, a remarkable constraint considering the small number of galaxies. All of our results are completely independent of the effects of galaxy bias, and fully consistent with the predictions of GR (scale-independent fσ₈ and γ ≈ 0.55).]]> Tue 03 Sep 2019 18:22:23 AEST ]]>