Erratum for: A&A, 626, A84 (2019), https://doi.org/10.1051/0004-6361/201834998

Because of a bug in the plotting program used, the ring-averaged velocities for the Guitar Core in L1287 were fitted up to radial distances of 20″, well outside of the central part of the core. A new fit was performed up to a radial distance of 12″, obtaining a best fit value of the central mass for L1287 of M_* = 2.1 M_⊙, and a best fit systemic velocity of V_sys = −18.67 km s⁻¹. The quality of the fit is indicated by the value of the χ² statistic for ν = 22 degrees of freedom (the total number of rings used in the fit, minus 2), χ² = 11.4, which gives a reduced ${\chi }_r={({\chi }^2/\nu )}^{1/2}=0.70$. We show a corrected version of Fig. 35. The correction does not affect values of the central mass for the other cores, G31 and B335.

© ESO 2021

All Figures

Fig. 35 Ring-averaged central velocity of the NH3 (1,1) (black circles) and (2,2) lines (red circles) in the Guitar Core in L1287. The rings used were 1″ wide, and the error bars are the rms of the values inside each ring. The central dashed line is the best fit obtained for an infinite infall radius and a central mass of M* = 2.1 M⊙, and the horizontal dotted line is the best fit systemic velocity, Vsys = −18.67 km s−1. The fits for central masses of 1.1 and 3.4 M⊙ are also shown.

In the text