<figure><img src="image_1.png" /></figure>

# Erratum: “First Detection of the Molecular Cloud Population in the Extended Ultraviolet Disk of M83” (2022, ApJ, 941, 3)

Jin Koda¹ ID, Linda Watson²,³, Françoise Combes⁴ ID, Monica Rubio⁵ ID, Samuel Boissier⁶ ID, Masafumi Yagi⁷ ID,
David Thilker⁸ ID, Amanda M Lee¹ ID, Yutaka Komiyama⁷,⁹,¹⁰ ID, Kana Morokuma-Matsui¹¹ ID, and Celia Verdugo³ ID

¹Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA; jin.koda@stonybrook.edu

²European Southern Observatory, Germany

³Joint ALMA Observatory (JAO), Alonso de Córdova 3107, Vitacura, Santiago, Chile

⁴Observatoire de Paris, LERMA, Collège de France, PSL Univ., CNRS, Sorbonne Univ., Paris, France

⁵Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile

⁶Aix Marseille Univ., CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France

⁷National Astronomical Observatory of Japan, Mitaka, Tokyo, 181-8588, Japan

⁸Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA

⁹Department of Advanced Sciences, Faculty of Science and Engineering, Hosei University, 3-7-2 Kajino-cho, Koganei-shi, Tokyo 184-8584, Japan

¹⁰Graduate University for Advanced Studies (SOKENDAI), Mitaka, Tokyo 181-8588, Japan

¹¹Institute of Astronomy, Graduate School of Science, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan

Received 2024 May 25; published 2024 July 1

We made two mistakes in the published article. First, the velocity dispersion $\sigma_v$ is miscalculated, and the reported $\sigma_v$ are 2.54 times larger than the true values. Second, the reported fluxes, and consequently the masses calculated from the fluxes, are not corrected for primary beam attenuation. The revised Table 3 and Figure 6 are presented here. In the table, we also add a new column (13) for primary beam attenuation.

These corrections do not change the main results and conclusions, except that the discussion in Section 4.3 of the published article, where the large $\sigma_v$ is discussed, should be dismissed.

The mistake in $\sigma_v$ is made when the units of $\sigma_v$ are converted from pixel to km s$^{-1}$.

The mistake in primary beam correction is inadvertent. The ranges of cloud and clump masses are mentioned at several locations in the article and should be corrected upward by 20%–30%. The discussions in the article are made in one-digit accuracy, and this upward correction does not alter the discussions nor the conclusions. The minimum and maximum masses of the clouds should be corrected from $(8.2 \times 10^2, 2.3 \times 10^4 M_\odot)$ to $(1.0 \times 10^3, 2.8 \times 10^4 M_\odot)$. The range of the clump mass should be corrected from $(2.7 \times 10^2, 7.5 \times 10^3 M_\odot)$ to $(3.4 \times 10^2, 9.1 \times 10^3 M_\odot)$. The cloud/clump with the minimum mass changes from #23 to #21.

<table><caption>**Table 3**
Cloud Parameters</caption><thead><tr><th>ID<br>(1)</th><th>R.A.<br>(J2000)<br>(2)</th><th>Decl.<br>(J2000)<br>(3)</th><th>V<br>(km s<sup>-1</sup>)<br>(4)</th><th>FWHMx<br>(arcsec)<br>(5)</th><th>FWHMy<br>(arcsec)<br>(6)</th><th>N<sub>xy</sub><br>(7)</th><th>σ<sub>v</sub><br>(km s<sup>-1</sup>)<br>(8)</th><th>S<sup>peak</sup><sub>CO(3-2)</sub><br>(mJy beam<sup>-1</sup>)<br>(9)</th><th>S<sub>CO(3-2)</sub><i>dv</i><br>(mJy km s<sup>-1</sup>)<br>(10)</th><th>M<sub>clump</sub><br>(M<sub>☉</sub>)<br>(11)</th><th>M<sub>cloud</sub><br>(M<sub>☉</sub>)<br>(12)</th><th>PB<br>(13)</th></tr></thead><tbody><tr><td>1</td><td>13:37:05.05</td><td>-29:59:34.0</td><td>558.5</td><td>0.81</td><td>0.52</td><td>52</td><td>1.3</td><td>18.45</td><td>75.0 ± 8.4</td><td>2.7 × 10<sup>3</sup></td><td>8.2 × 10<sup>3</sup></td><td>0.30</td></tr><tr><td>2</td><td>13:37:05.04</td><td>-29:59:36.2</td><td>555.0</td><td>0.59</td><td>0.57</td><td>39</td><td>1.6</td><td>12.47</td><td>29.9 ± 4.9</td><td>1.1 × 10<sup>3</sup></td><td>3.3 × 10<sup>3</sup></td><td>0.42</td></tr><tr><td>3</td><td>13:37:04.79</td><td>-29:59:41.0</td><td>562.5</td><td>1.67</td><td>1.46</td><td>197</td><td>2.3</td><td>17.89</td><td>144.8 ± 8.8</td><td>5.2 × 10<sup>3</sup></td><td>1.6 × 10<sup>4</sup></td><td>0.55</td></tr><tr><td>4</td><td>13:37:04.99</td><td>-29:59:46.1</td><td>564.4</td><td>1.02</td><td>0.95</td><td>156</td><td>2.6</td><td>26.15</td><td>251.6 ± 8.8</td><td>9.1 × 10<sup>3</sup></td><td>2.8 × 10<sup>4</sup></td><td>0.83</td></tr><tr><td>5</td><td>13:37:06.48</td><td>-29:59:49.0</td><td>562.1</td><td>1.13</td><td>0.98</td><td>85</td><td>0.8</td><td>7.65</td><td>27.7 ± 3.1</td><td>1.0 × 10<sup>3</sup></td><td>3.0 × 10<sup>3</sup></td><td>0.93</td></tr><tr><td>6</td><td>13:37:06.17</td><td>-29:59:50.4</td><td>552.2</td><td>0.93</td><td>0.50</td><td>51</td><td>0.0</td><td>5.93</td><td>13.9 ± 2.0</td><td>5.0 × 10<sup>2</sup></td><td>1.5 × 10<sup>3</sup></td><td>0.97</td></tr><tr><td>7</td><td>13:37:05.32</td><td>-29:59:50.6</td><td>560.5</td><td>0.78</td><td>0.48</td><td>33</td><td>1.1</td><td>5.13</td><td>8.5 ± 1.3</td><td>3.1 × 10<sup>2</sup></td><td>9.3 × 10<sup>2</sup></td><td>0.96</td></tr><tr><td>8</td><td>13:37:05.06</td><td>-29:59:51.2</td><td>565.8</td><td>1.13</td><td>0.60</td><td>83</td><td>1.2</td><td>6.89</td><td>31.5 ± 3.1</td><td>1.1 × 10<sup>3</sup></td><td>3.5 × 10<sup>3</sup></td><td>0.90</td></tr><tr><td>9</td><td>13:37:05.35</td><td>-29:59:52.8</td><td>561.4</td><td>0.93</td><td>0.89</td><td>96</td><td>1.2</td><td>7.28</td><td>35.0 ± 3.4</td><td>1.3 × 10<sup>3</sup></td><td>3.9 × 10<sup>3</sup></td><td>0.97</td></tr><tr><td>10</td><td>13:37:05.04</td><td>-29:59:53.0</td><td>567.5</td><td>0.82</td><td>0.95</td><td>101</td><td>1.3</td><td>10.69</td><td>48.8 ± 3.9</td><td>1.8 × 10<sup>3</sup></td><td>5.4 × 10<sup>3</sup></td><td>0.89</td></tr><tr><td>11</td><td>13:37:05.91</td><td>-29:59:55.3</td><td>564.6</td><td>0.73</td><td>0.70</td><td>62</td><td>0.8</td><td>8.47</td><td>22.5 ± 2.6</td><td>8.1 × 10<sup>2</sup></td><td>2.5 × 10<sup>3</sup></td><td>0.99</td></tr><tr><td>12</td><td>13:37:05.19</td><td>-29:59:55.4</td><td>565.5</td><td>0.77</td><td>0.60</td><td>61</td><td>1.1</td><td>10.35</td><td>32.8 ± 3.0</td><td>1.2 × 10<sup>3</sup></td><td>3.6 × 10<sup>3</sup></td><td>0.94</td></tr><tr><td>13</td><td>13:37:05.09</td><td>-29:59:55.7</td><td>567.7</td><td>0.84</td><td>0.71</td><td>89</td><td>1.7</td><td>17.30</td><td>81.9 ± 4.7</td><td>2.9 × 10<sup>3</sup></td><td>9.0 × 10<sup>3</sup></td><td>0.91</td></tr><tr><td>14</td><td>13:37:04.98</td><td>-29:59:57.0</td><td>567.8</td><td>0.70</td><td>0.52</td><td>45</td><td>0.9</td><td>6.90</td><td>16.8 ± 2.4</td><td>6.1 × 10<sup>2</sup></td><td>1.9 × 10<sup>3</sup></td><td>0.86</td></tr><tr><td>15</td><td>13:37:04.82</td><td>-29:59:59.5</td><td>570.4</td><td>0.76</td><td>0.87</td><td>75</td><td>1.0</td><td>11.51</td><td>37.5 ± 3.3</td><td>1.3 × 10<sup>3</sup></td><td>4.1 × 10<sup>3</sup></td><td>0.78</td></tr><tr><td>16</td><td>13:37:06.68</td><td>-29:59:59.7</td><td>564.9</td><td>0.65</td><td>0.67</td><td>51</td><td>1.3</td><td>6.15</td><td>17.4 ± 2.3</td><td>6.3 × 10<sup>2</sup></td><td>1.9 × 10<sup>3</sup></td><td>0.87</td></tr><tr><td>17</td><td>13:37:04.74</td><td>-30:00:01.1</td><td>569.8</td><td>0.77</td><td>0.91</td><td>78</td><td>0.7</td><td>9.72</td><td>36.9 ± 3.6</td><td>1.3 × 10<sup>3</sup></td><td>4.1 × 10<sup>3</sup></td><td>0.74</td></tr><tr><td>18</td><td>13:37:06.41</td><td>-30:00:01.4</td><td>563.8</td><td>0.57</td><td>0.53</td><td>38</td><td>1.3</td><td>6.24</td><td>14.6 ± 2.0</td><td>5.3 × 10<sup>2</sup></td><td>1.6 × 10<sup>3</sup></td><td>0.96</td></tr><tr><td>19</td><td>13:37:06.01</td><td>-30:00:02.1</td><td>562.3</td><td>0.61</td><td>0.75</td><td>46</td><td>0.1</td><td>5.82</td><td>12.8 ± 1.7</td><td>4.6 × 10<sup>2</sup></td><td>1.4 × 10<sup>3</sup></td><td>1.00</td></tr><tr><td>20</td><td>13:37:04.85</td><td>-30:00:03.6</td><td>569.0</td><td>0.96</td><td>0.55</td><td>61</td><td>1.2</td><td>6.58</td><td>23.4 ± 2.8</td><td>8.4 × 10<sup>2</sup></td><td>2.6 × 10<sup>3</sup></td><td>0.82</td></tr></tbody></table>

<figure><img src="image_2.png" /></figure>

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<table><caption>**Table 3**
(Continued)</caption><thead><tr><th>ID<br>(1)</th><th>R.A.<br>(J2000)<br>(2)</th><th>Decl.<br>(J2000)<br>(3)</th><th>V<br>(km s<sup>-1</sup>)<br>(4)</th><th>FWHMx<br>(arcsec)<br>(5)</th><th>FWHMy<br>(arcsec)<br>(6)</th><th>N<sub>xy</sub><br>(7)</th><th>σ<sub>v</sub><br>(km s<sup>-1</sup>)<br>(8)</th><th>S<sup>peak</sup><sub>CO(3-2)</sub><br>(mJy beam<sup>-1</sup>)<br>(9)</th><th>S<sub>CO(3-2)</sub>dv<br>(mJy km s<sup>-1</sup>)<br>(10)</th><th>M<sub>clump</sub><br>(M<sub>☉</sub>)<br>(11)</th><th>M<sub>cloud</sub><br>(M<sub>☉</sub>)<br>(12)</th><th>PB<br>(13)</th></tr></thead><tbody><tr><td>21</td><td>13:37:05.57</td><td>-30:00:06.6</td><td>567.4</td><td>0.72</td><td>0.41</td><td>34</td><td>0.0</td><td>6.37</td><td>9.5 ± 1.5</td><td>3.4 × 10<sup>2</sup></td><td>1.0 × 10<sup>3</sup></td><td>0.99</td></tr><tr><td>22</td><td>13:37:05.77</td><td>-30:00:11.2</td><td>570.5</td><td>1.02</td><td>0.53</td><td>58</td><td>1.0</td><td>7.47</td><td>18.7 ± 2.3</td><td>6.7 × 10<sup>2</sup></td><td>2.1 × 10<sup>3</sup></td><td>0.91</td></tr><tr><td>23</td><td>13:37:05.21</td><td>-30:00:15.1</td><td>566.9</td><td>0.57</td><td>0.40</td><td>26</td><td>1.0</td><td>7.73</td><td>11.1 ± 1.8</td><td>4.0 × 10<sup>2</sup></td><td>1.2 × 10<sup>3</sup></td><td>0.68</td></tr></tbody></table>

**Note.** (1) Cloud ID. (2), (3) Coordinate. (4) Recession velocity *V*. (5), (6) FWHM widths in R.A. (=x) and decl. (=y) directions, calculated from intensity-weighted dispersions and assuming a Gaussian profile. (7) Number of pixels with >3σ emission in the sky projection. (8) Velocity dispersion measured with the 1 km s⁻¹ cube. (9) Peak intensity within the cloud after primary beam correction. (10) Total flux of the cloud after primary beam correction. The error is a random error and does not include systematic errors. (11), (12) Clump and cloud masses, including CO-dark H₂ as well as He. $M_{cloud} = M_{clump}/0.34$. (13) Primary beam attenuation. Note that the beam-deconvolved radius *R* is not listed, since it is only an upper limit (*R* < 0.′′48) for all clouds except Cloud 3 (*R* = 1.′′05) whose measurement suffers from the spurious extension (see Section 4.2).

<figure><img src="image_3.png" /></figure>

**Figure 6.** Cloud radius–velocity dispersion plot. M83 XUV clouds are blue (and the blue arrows are the upper limits in radius, while they are resolved in velocity). Reference points in the background are for the MW’s inner disk (Solomon et al. 1987), outer disk ($r_{gal} \sim 12–14$ kpc; Sun et al. 2017), and far outer disk (~14–22 kpc; Sun et al. 2015), and for the Large and Small Magellanic Clouds (Wong et al. 2011; Bolatto et al. 2008) and WLM (Rubio et al. 2015). The solid line is a fit to the inner disk clouds (Solomon et al. 1987).

## ORCID iDs

Jin Koda https://orcid.org/0000-0002-8762-7863

Françoise Combes https://orcid.org/0000-0003-2658-7893

Monica Rubio https://orcid.org/0000-0002-5307-5941

Samuel Boissier https://orcid.org/0000-0002-9091-2366

Masafumi Yagi https://orcid.org/0000-0001-7550-2281

David Thilker https://orcid.org/0000-0002-8528-7340

Amanda M Lee https://orcid.org/0000-0001-8254-6768

Yutaka Komiyama https://orcid.org/0000-0002-3852-6329

Kana Morokuma-Matsui https://orcid.org/0000-0003-3932-0952

Celia Verdugo https://orcid.org/0009-0009-5084-3472

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Rubio, M., Elmegreen, B. G., Hunter, D. A., et al. 2015, Natur, 525, 218

Solomon, P. M., Rivolo, A. R., Barrett, J., & Yahil, A. 1987, ApJ, 319, 730

Sun, Y., Xu, Y., Yang, J., et al. 2015, ApJL, 798, L27

Sun, Y., Su, Y., Zhang, S.-B., et al. 2017, ApJS, 230, 17

Wong, T., Hughes, A., Ott, J., et al. 2011, ApJS, 197, 16