Using the nearly full sky K _ { s } = 11.75 2MASS Redshift Survey [ 2MRS ] of \sim 45 , 000 galaxies we reconstruct the underlying peculiar velocity field and constrain the cosmological bulk flow within \sim 100 { h ^ { -1 } Mpc } .
These results are obtained by maximizing the probability to estimate the absolute magnitude of a galaxy given its observed apparent magnitude and redshift .
At a depth of \approx 60 { h ^ { -1 } Mpc } we find a bulk flow \bf v _ { B } = ( 90 \pm 65 , -230 \pm 65 , 50 \pm 65 ) \mbox { km s$ { } ^ { -1 } $ } in agreement with the theoretical predictions of the \Lambda CDM model .
The reconstructed peculiar velocity field \bf v that maximizes the likelihood is characterized by the parameter \beta = 0.323 \pm 0.08 .
Both results are in agreement with those obtained previously using the \sim 23 , 000 galaxies of the shallower K _ { s } = 11.25 2MRS survey .

In our analysis we find that the luminosity function of 2MRS galaxies is poorly fitted by the Schechter form and that luminosity evolves such that objects become fainter with increasing redshift according to L ( z ) = L ( z = 0 ) ( 1 + z ) ^ { +2.7 \pm 0.15 } .