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We generate constrained realizations (CRs) of the density and peculiarvelocity fields within $200 \; h^{-1} \, \mathrm{Mpc}$ from the final releaseof the Two-Micron All-Sky Redshift Survey (2MRS) $-$ the densest all-skyredshift survey to date. The CRs are generated by combining a Wiener filterestimator in spherical Fourier-Bessel space with random realizations oflog-normally distributed density fields and Poisson-sampled galaxy positions.The algorithm is tested and calibrated on a set of semi-analytic mock catalogsmimicking the environment of the Local Group (LG), to rigorously account forthe statistical and systematic errors of the reconstruction method. Bycomparing our peculiar velocity CRs with the observed velocities from theCosmicflows-3 catalog, we constrain the normalized linear growth rate to $f\sigma_8^\mathrm{lin} = 0.367 \pm 0.060$, which is consistent at the $1.1\sigma$ level with the latest Planck results as well as other direct probes.Simultaneously, we estimate a bulk flow contribution from sources beyond the2MRS reconstruction volume of $B^\mathrm{ext} = 199 \pm 68 \; \mathrm{km} \,\mathrm{s}^{-1}$ towards $l = 299 \pm 18^\circ$, $b = 8 \pm 19^\circ$. Thetotal reconstructed velocity field at the position of the LG, smoothed with a$1 \; h^{-1} \, \mathrm{Mpc}$ Gaussian, is $685 \pm 75 \; \mathrm{km} \,\mathrm{s}^{-1}$ towards $l = 270.6 \pm 6.6^\circ$, $b = 35.5 \pm 7.2^\circ$,in good agreement with the observed CMB dipole. The total reconstructed bulkflow within different radii is compatible with other measurements. Within a $50\; h^{-1} \, \mathrm{Mpc}$ Gaussian window we find a bulk flow of $274 \pm 50\; \mathrm{km} \, \mathrm{s}^{-1}$ towards $l = 287 \pm 9^\circ$, $b = 11 \pm10^\circ$. The code used to generate the CRs and obtain these results, dubbedCORAS, is made publicly available.

Constrained realizations of 2MRS density and peculiar velocity fields: growth rate and local flow