| Nebula . | atomic C . | graphite grains . | C60 . | Mass frac. . |
|---|---|---|---|---|
| . | (×10−4 M|$\odot$|) . | (× 10−5 M|$\odot$|) . | (×10−7 M|$\odot$|) . | of C60 (%) . |
| IC418 | 3.99 | 1.70 | 2.26 | 0.05 |
| Lin49 | 3.00 | 4.15 − 4.29 | 3.05 − 4.64 | 0.09 − 0.14 |
| SaSt2-3 | 2.17 | 2.08 | 4.53 | 0.19 |
| Nebula . | atomic C . | graphite grains . | C60 . | Mass frac. . |
|---|---|---|---|---|
| . | (×10−4 M|$\odot$|) . | (× 10−5 M|$\odot$|) . | (×10−7 M|$\odot$|) . | of C60 (%) . |
| IC418 | 3.99 | 1.70 | 2.26 | 0.05 |
| Lin49 | 3.00 | 4.15 − 4.29 | 3.05 − 4.64 | 0.09 − 0.14 |
| SaSt2-3 | 2.17 | 2.08 | 4.53 | 0.19 |
Note. – Mass of C60 is determined by (graphite grain mass for Lin49 and SaSt2-3) or (the total dust mass 7.76(−5) M|$\odot$| including graphite grain for IC418; Gómez-Llanos et al. 2018) × I(C60)/I(IR). I(C60) is the total flux of the mid-IR C60 bands measured by Otsuka et al. (2014, 1.03(−10) erg s−1 cm−2 for IC 418 using the ISO/SWS/LWS and Spitzer combined spectrum), Otsuka et al. (2016, 9.26(−14) erg s−1 cm−2 for Lin 49), and the present work for SaSt2-3 ( 9.43(−13) erg s−1 cm−2). I(IR) in IC418, Lin49, and SaSt2-3 is 3.53(−8), 1.26(−11) (two-shell model)/8.56(−12) (single shell model), and 4.33(−11) in erg s−1 cm−2, respectively.
| Nebula . | atomic C . | graphite grains . | C60 . | Mass frac. . |
|---|---|---|---|---|
| . | (×10−4 M|$\odot$|) . | (× 10−5 M|$\odot$|) . | (×10−7 M|$\odot$|) . | of C60 (%) . |
| IC418 | 3.99 | 1.70 | 2.26 | 0.05 |
| Lin49 | 3.00 | 4.15 − 4.29 | 3.05 − 4.64 | 0.09 − 0.14 |
| SaSt2-3 | 2.17 | 2.08 | 4.53 | 0.19 |
| Nebula . | atomic C . | graphite grains . | C60 . | Mass frac. . |
|---|---|---|---|---|
| . | (×10−4 M|$\odot$|) . | (× 10−5 M|$\odot$|) . | (×10−7 M|$\odot$|) . | of C60 (%) . |
| IC418 | 3.99 | 1.70 | 2.26 | 0.05 |
| Lin49 | 3.00 | 4.15 − 4.29 | 3.05 − 4.64 | 0.09 − 0.14 |
| SaSt2-3 | 2.17 | 2.08 | 4.53 | 0.19 |
Note. – Mass of C60 is determined by (graphite grain mass for Lin49 and SaSt2-3) or (the total dust mass 7.76(−5) M|$\odot$| including graphite grain for IC418; Gómez-Llanos et al. 2018) × I(C60)/I(IR). I(C60) is the total flux of the mid-IR C60 bands measured by Otsuka et al. (2014, 1.03(−10) erg s−1 cm−2 for IC 418 using the ISO/SWS/LWS and Spitzer combined spectrum), Otsuka et al. (2016, 9.26(−14) erg s−1 cm−2 for Lin 49), and the present work for SaSt2-3 ( 9.43(−13) erg s−1 cm−2). I(IR) in IC418, Lin49, and SaSt2-3 is 3.53(−8), 1.26(−11) (two-shell model)/8.56(−12) (single shell model), and 4.33(−11) in erg s−1 cm−2, respectively.
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