SIMBAD references

We present measurements of baryonic mass M_b and specific angular momentum (sAM) j_b in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS sample. These measurements, based on 21 cm kinematic data from the Very Large Array and stellar mass maps from the Spitzer Space Telescope, extend previous AM measurements by more than two orders of magnitude in M_b. The dwarf galaxies show systematically higher j_b values than expected from the j_b∝M_b^2/3 scaling of spiral galaxies, representative of a scale-free galaxy formation scenario. This offset can be explained by decreasing baryon mass fractions f_M=M_b/M_dyn (where M_dyn is the dynamical mass) with decreasing M_b (for M_b 10¹¹ M_☉). We find that the sAM of neutral atomic hydrogen (H i) alone is about 2.5 times higher than that of the stars. The M-j relation of H i is significantly steeper than that of the stars, as a direct consequence of the systematic variation of the H i fraction with M_b.