Table 1
Comparison of Wray15-751 and Hen 3-1379.
| Wray15-751 | Hen 3-1379 | |
|
|
||
| log L/L⊙ | 5.7 ± 0.2 | 5.7 ± 0.1 |
| Teff (103 K) | 30 ↔ 9 | 8.5 ± 1.0 |
| d (kpc) | 6.0 ± 1.0 | 4.0 ± 0.5 |
| r (inner shell) (pc) | 0.5 | 0.04 |
| r (outer shell) (pc) | 2.0 | 0.5 |
| vexp (km s-1) | 26 | ~30 |
| tkin (inner shell) (104 yr) | 1.9 | 0.13 |
| tkin (outer shell) (104 yr) | 7.5 | 1.6 |
| Md (inner shell) (10-2M⊙) | 4.5 ± 0.5 | 0.21 ± 0.06 |
| Md (outer shell) (10-2M⊙) | 5.0 ± 2.0 | 17 ± 5 |
Notes.The expansion velocity of the Hen 3-1379 nebula is assumed similar to the one measured for the shell around yellow hypergiant IRC+10420, i.e., vexp ≃ 25−37 km s-1 (Castro-Carrizo et al. 2007). The inner shell of Hen 3-1379 refers to the whole “Fried Egg” nebula and the outer shell to the large ring nebula.
Reference. Sterken et al. (2008); Vamvatira-Nakou et al. (in prep.); Lagadec et al. (2011a); this work.
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