Erratum: Using interstellar clouds to search for Galactic PeVatrons: gamma-ray signatures from supernova remnants (Monthly Notices of the Royal Astronomical Society (2021) 503 (3522–3539) DOI: 10.1093/mnras/stab667)
Mitchell A, Rowell GP, Celli S, Einecke S (2023)
Publication Type: Journal article, Erratum
Publication year: 2023
Journal
Book Volume: 520
Pages Range: 300-304
Journal Issue: 1
DOI: 10.1093/mnras/stac2224
Abstract
The paper ‘Using interstellar clouds to search for Galactic PeVatrons: gamma-ray signatures from supernova remnants’ was published in MNRAS 503 3522–3539 (2021). Following publication, a few issues were found in the numerical implementation of the described method, which influenced the predicted fluxes and the sorting of SNR–cloud pairs. Also, the catalogue values for SNR sizes are diameters, yet were interpreted as radii. These issues have now been corrected and a brief summary of revised results are presented in this erratum. Additionally, the following equations require revision: (i) A typographical error in the units for f(E, r, t) which should read cm−3GeV−1; (ii) Equation (9) contained a typographical error yet was correct in the implementation, it should read: √πRd3 f0 = (√πRd2 + 2√πRSNR2 ) Rd + 4RSNRRd2; (iii) Equation (11) should be replaced by the following equation from Reynolds (2008): RSNR(t) = 0.31 ( (n/(E1cmSN/−103)(51μerg)1/1.4) )1/5 (t/yr)2/5 pc; (iv) Equation (14) should read F(Eγ , t) = γ (Eγ , t)Vc/(4πD2 ). The combined effect of the corrections affects the shape of the curves in figs 3–5 and the predicted fluxes in subsequent figures and tables, in particular a reduction in flux at energies above 100 TeV, although the absolute flux normalization is at a comparable level for energies above 10 TeV. We provide here replacements for figs 3–5 (here Figs 1–3) and tables 2–4 (here Tables 1–3), for an integral γ -ray flux above 100 TeV. The coordinates of the cloud and SNR pairs and new predictions for the integral γ -ray flux are shown in Tables 2 and 3 and A1, with cloud properties and flux upper limits from H.E.S.S. Collaboration (2018). Replacements are also provided for figs 6 and 7 (here Figs 4 and 5). After these changes, the slow diffusion case is more favourable in generating a detectable gamma-ray flux. Indeed, in the fast diffusion case, there are no clouds predicted to have a gamma-ray flux detectable by CTA-S above 100 TeV. Consequently, we now show Figs 6 and 7 (replacements for figs 8 and 9 respectively) and Table 1 (replacement for table 2) for the slow diffusion case. Additionally, we note that after correcting the issues described above, none of the clouds have a predicted flux that violates an upper limit obtained from the HGPS in either fast or slow diffusion cases. An additional issue affecting the matching of SNRs to nearby clouds, leading to pairs listed in the original work with large angular distances or SNRs overlapping with clouds along the line-of-sight, has also been corrected in the revised tables. The discussion of section 5.1 is focused on the clouds with the brightest predicted gamma-ray flux as compared to the HGPS and in section 5.2 to HAWC observations. As the predicted fluxes are revised (see figs B1–B4), so the comparison should be interpreted in the context of these new results. From Tables 2 and 3, we see that the four clouds located at (333.46, −0.31), (16.97, 0.53), (110.43, 1.89), and (336.73, −0.98) are now the most favourable candidates for detecting a significant gamma-ray flux above 100 TeV. Further replacement figures and tables for the remaining results affected can be found in the online supplementary material.
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APA:
Mitchell, A., Rowell, G.P., Celli, S., & Einecke, S. (2023). Erratum: Using interstellar clouds to search for Galactic PeVatrons: gamma-ray signatures from supernova remnants (Monthly Notices of the Royal Astronomical Society (2021) 503 (3522–3539) DOI: 10.1093/mnras/stab667). Monthly Notices of the Royal Astronomical Society, 520(1), 300-304. https://dx.doi.org/10.1093/mnras/stac2224
MLA:
Mitchell, Alison, et al. "Erratum: Using interstellar clouds to search for Galactic PeVatrons: gamma-ray signatures from supernova remnants (Monthly Notices of the Royal Astronomical Society (2021) 503 (3522–3539) DOI: 10.1093/mnras/stab667)." Monthly Notices of the Royal Astronomical Society 520.1 (2023): 300-304.
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