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Table 4.
Observed lowest luminosities of intrinsic S stars in different mass and metallicity bins (collected from this work, S18, S19, and S20).
| Stars | Initial mass (M⊙) | [Fe/H] | LTDU (L⊙) | |
|---|---|---|---|---|
| Mini < 1.0 M⊙ | V915 Aql | 1.0 | −0.5 | 2000 |
| 1.0 M⊙ < Mini < 1.5 M⊙ | IRAS 06000+1023 (CSS 182) | 1.3 | −0.40 | 2500 |
| HD 288833 | 1.4 | −0.30 | 1700 | |
| 1.5 M⊙ < Mini < 2.0 M⊙ | BD −18 2608 | 1.6 | −0.31 | 2400 |
| V812 Oph | 2.0 | −0.37 | 3000 | |
| 2.0 M⊙ < Mini < 2.5 M⊙ | BD +79°156 | 2.1 | −0.16 | 2600 |
| V679 Oph | 2.1 | −0.52 | 4600 | |
| 2.5 M⊙ < Mini < 3.0 M⊙ | HD 64147 | 2.9 | −0.67 | 5400 |
| CSS 1152 | 3.0 | −0.14 | 4400 | |
| KR CMa | 3.0 | −0.01 | 4800 | |
| Mini > 3.0 M⊙ | CSS 151 | 3.2 | −0.25 | 4600 |
| V1139 Tau | 3.5 | −0.06 | 6600 | |
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