Stellar mass surface density profile of Nube as observed by Montes et al. (2024, the symbols with error bars). The figure includes three different fits to this observation: a projected polytrope (PP; the black line, with its index m given in the inset) and two projected abc profiles (Eq. (1)). The inner slope (−c) is forced to be zero in the PP fit whereas becomes positive (i.e., c < 0) when allowed to vary (see the inset). The gray error bars are those provided by Montes et al. (symmetric in a linear scale and so asymmetric in the logarithmic representation used in the figure) whereas the symmetrized ones¹ (the blue bars) are equivalent but symmetric in the logarithmic representation.