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Peculiar velocity analysis is currently a growing field due to the advent of new data from various surveys. One statistic that can be derived from peculiar velocity analyses is the bulk flow within the survey volume, which is closely related to the cosmological model and so can be used to test theories.To measure the bulk flow accurately, a sky coverage as complete as possible is needed to disentangle the dipole from the monopole component of the velocity field. In this work, we use the Fundamental Plane (FP) relation for early-type galaxies to measure distances. We measure peculiar velocities as the logarithmic ratio of the distances inferred from observed redshifts and comoving distances derived from the FP. Our final peculiar velocity sample consists of 15525 individual galaxies. We measure the bulk flow within the survey volume directly from the log-distance ratio measurements using a maximum likelihood method. These amplitudes are consistent at 1 sigma with the root-mean-square bulk motions expected in a standard LCDM cosmology. |
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