Radial distribution of specific angular momentum along the equatorial axis for L1448-2A. Blue and red dots show the blue- and red-shifted rotational velocities, respectively. Dots and large dots show points from C¹⁸O and N₂H⁺ emission, respectively. The arrows display upper limits of j determined from velocity maps that do not exhibit a spatial distribution of velocities as organized as one would expect from rotation motions (see Sect. 4.3 and Appendix C). The dashed line shows the best least-square fitting with a power-law model leaving the index β as a free parameter (j ∝ r^β).