Table 3.
Physical size and estimated mass of the sample sources.
| Source | Size UV | Size optical | Mass | Reference |
|---|---|---|---|---|
| (pc) | (pc) | (M⊙) | for mass | |
| R136 | 0.5 | 0.5 | ≤104.70 | (1) |
| NGC 3125-A1 | 139 and 180 | 70 × 45 and 90 × 58 | 105.62 | (2) |
| NGC 5253-5 | 9.3 × 1.7 | 56 × 24 | < 105.52 | (3) |
| Tol 89-A | 20 × 35 | 171 × 100 | 105.08 − 10−5.48 | (4) |
| NGC 5447S | 81 | 198 × 26 | – | – |
| NGC 5455 | 81 | 165 × 26 | – | – |
| NGC 5462S | 81 | 133 × 26 | – | – |
| SIP2007-1 | 81 | 97 | – | – |
| HGGK 1054 | 81 | 97 | – | – |
| HGGK 1216 | 81 | 117 × 26 | – | – |
| NGC 4214 | 5 × 3 | 7 × 3 | – | – |
| NGC 4670 | 238 | 47 × 19 | – | – |
| Mrk 33 | 20 × 15 | 224 | – | – |
| J0036−3333 | 1078 | 1294 | 108.77 | (5, COS) |
| J0115−0051/SB49 | 376 | 451 | 105.80 | (6, SDSS) |
| J0823+2806 | 2530 | 3040 | 108.47 | (5, COS) |
| J0942+0928/SB80 | 557 | 669 | 106.10 | (7, SDSS) |
| J1105+4444 | 1127 | 1352 | 107.76 | (5, COS) |
| J1129+2034/SB179 | 254 and 303 | 305 and 364 | 105.75 and 105.20 | (5, COS) and (7, SDSS) |
| J1132+1411/SB125 | 921 and 945 | 1105 and 1134 | 106.79 and 106.66 | (5, COS) and (6, SDSS) |
| J1157+3220 | 582 | 698 | 107.33 | (5, COS) |
| J1200+1343 | 3636 | 4363 | 107.46 | (5, COS) |
| J1215+2038/SB191 | 121 | 145 | 104.9 | (7, SDSS) |
| J1304−0333/SB9 | 242 | 97 | 105.05 | (6, SDSS) |
| J1314+3452/SB153 | 158 and 133 | 189 and 160 | 105.28 and 104.93 | (5, COS) and (6, SDSS) |
| J1428+1653 | 10 666 | 12 800 | 109.50 | (5, COS) |
| J1525+0757 | 4157 | 4989 | 109.13 | (5, COS) |
Notes. The sizes are those of the region over which the spectrum is extracted. For SDSS and COS data, we give the diameter (3″ and 2.5″) at the distance of the source. For slit spectra, we give the extraction size times the slit width at the distance of the source. Multiple entries separated by a slash indicate multiple values of the source distance (see Table 1). Columns 2 and 3 correspond to UV and optical data, respectively. The masses in Col. 4 are taken from the literature. The labels COS or SDSS for masses refer to masses extracted from an SED fitting of photometry in the COS or SDSS aperture. Masses without a label are for the entire star-forming region.
References. (1) Crowther et al. (2016); (2) Hadfield & Crowther (2006); (3) Smith et al. (2016); (4) Sidoli et al. (2006); (5) Berg et al. (2022); (6) Senchyna et al. (2021); (7) Senchyna et al. (2017).
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