Table 4
Fundamental parameters of Canopus obtained from the best fit to the un-reddened SED.
| Parameters derived from the SED model-fit | |
|---|---|
| Best-fit parameters from the two-Teff model | Related parameters |
| E(B−V) = 0.084 mag, RV = 3.1 | AV = 0.26 mag |
| log L∕L⊙ = 4.221 ± 0.018 dex | fbol = (59.22 ± 2.45) × 10−6 erg cm−2 s−1 |
 K,  K, a = 0.49 |
 K |
 mas |
 |
| log gmod = 1.70 ± 0.05 dex |  |
| Parameters derived using stellar evolution models | |
| (Values supposing Canopus on the blue loop phase, toward the blue or the red supergiants) | |
| Ω∕Ωc = 0.0 (V∕Vc = 0.0) | Ω∕Ωc = 0.95 (V∕Vc ≃ 0.81) |
 (9.64 or 9.63) ± 1.42 |
 (9.26 or 9.25) ± 1.40 |
| Ageevol = (24 or 25) ± 3 Ma | Ageevol = (33 or 34) ± 4 Ma |
Notes. Fundamental parameters of Canopus obtained from the best-fit to the un-reddened SED using the two-Teff model (upper part of the table) and from stellar evolution (Geneva) models (lower part). The parameters measured directly from log L∕L⊙, global
(two-Teff model; Eq. (3)), and log g, called “Rosseland” parameters, are noted with the subindex “Ross”. The parameters in the right column are related mainly (but not exclusively) to those in the left column on the same line by the adopted distance or the equations defined in Sects. 3.2 and 3.3. The parameters estimated with evolutionarymodels, noted with the subindex “evol”, correspond to two ZAMS velocity ratios. The Hipparcos parallax (π = 10.55 ± 0.56 mas; van Leeuwen 2007) was used to relate the bolometric luminosity, L, the bolometric flux, fbol, and the angular and linear sizes. See the discussion in Sect. 4.3.
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