Table 1
Parameters, both stellar and nebular, of Hen 2-155 and Hen 2-161 from the literature.
| Hen 2-155 | Hen 2-161 | References | |
|
|
|||
| Reddening, c(Hβ) | 0.81–1.01 | 0.35–1.80 | 1, 2 |
| Distance (kpc) | 2.47–3.15 | 3.64–5.31 | 3, 4 |
| Central star temperature | TZ(H) = 51 | TEB = 35.1 | 5, 6 |
| Estimate(s) (kK) | TZ(He ii) = 73 | ||
| Nebular systemic | –35.3 ± 15.0 | −98.0 ± 9.0 | 7 |
| Velocity ( km s-1) | |||
| Approximate | 14.5–16.9a | 9.7–16.3 | 8 |
| Nebular diameter (′′) | |||
Notes.
This measurement encompasses the “waist” of the nebula but not the wispy extensions which reach out to ~30′′ from the central star.
Reference. (1) Cavichia et al. (2010); (2) Cahn et al. (1992); (3) Phillips (2004); (4) Stanghellini et al. (2008); (5) Kaler & Jacoby (1991); (6) Preite-Martinez et al. (1989); (7) Durand et al. (1998); (8) Tylenda et al. (2003).
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