Erratum Temperature Spectra of Interstellar Dust Grains Heated by Cosmic Rays. II. Dark Cloud Cores (Astrophysical Journal, Supplement Series (2018) 239 (6) DOI: 10.3847/1538-4365/aae527)

In calculating the cosmic-ray (CR) spectra Jk, the intervals between different CR energy Ek input values were mistakenly multiplied by the atomic mass value Ak of each CR elemental species k. In effect, the spectrum of each CR species was overestimated by a factor equal to Ak, meaning that heavier elements had increasingly overestimated Jk. Because the heavy elements are able to impart higher energies Egrain into the grains, this error increasingly overestimates the frequencies fT for CR grain collision events, leading to grain heating to higher temperatures. Therefore, the overall error in the primary results (the TCR frequency spectra) spans 1 2 mag, which is significant and requires the publication of recalculated data. A number of figures and tables, as well as the full data of Appendix B (Tables 8 31), had to be corrected. Figure 1 shows the energy spectra, MeV per nucleon, of potassium ions (in the published article, the actual energy units used were MeV per K ion). Figures 3 5 show the correctly calculated energy spectra for the 0.05, 0.1, and 0.2 μm grains. Figures 6 8 show the recalculated temperature spectra of the CR-heated grains. Finally, Figure 9 shows the recalculated NH-dependent heating rate of 0.1 μm grains with TCR > 70 K. Equation (2) shows the correct expression for f>70: > =g ×453 ×1016×H-1.304 ( ) The full temperature and energy spectra for 0.05, 0.1, and 0.2 μm grains have been fully recalculated and are listed in Tables 8 31 of Appendix. The correct data for grain heating to or above threshold TCR values are collected in Tables 3 5. (Table Presented).