Open Access
Table 1.
Parameters of the WC+WN system Apep.
| Parameter | Value | Reference |
|---|---|---|
| Distance |
 kpc |
Callingham et al. (2019) |
| Projected system separation | Dproj = 47 ± 6 mas | Han et al. (2020) |
| Projection angle | ψ = 85° | del Palacio et al. (2022) |
| Wind momentum rate ratio | η = 0.44 ± 0.08 | Marcote et al. (2021) |
| Stellar temperature | Teff, WN = 65 000 K | Typical (e.g., Crowther 2007; Hamann et al. 2019) |
| Stellar radius | RWN = 6 R⊙ | Typical (e.g., Hamann et al. 2019) |
| Wind terminal velocity | v∞, WN = 3500 ± 100 km s−1 | Callingham et al. (2020) |
| Wind mass-loss rate | ṀWN = (4 ± 1) × 10−5 M⊙ yr−1 | del Palacio et al. (2022) |
| Wind mean atomic weight | μWN = 2.0 | Typical (e.g., Leitherer et al. 1995) |
| Stellar temperature | Teff, WC = 60 000 K | Typical (e.g., Crowther 2007; Sander et al. 2019) |
| Stellar radius | RWC = 6.3 R⊙ | Typical (e.g., Sander et al. 2019) |
| Wind terminal velocity | v∞, WC = 2100 ± 200 km s−1 | Callingham et al. (2020) |
| Wind mass-loss rate | ṀWC = (2.9 ± 0.7) × 10−5 M⊙ yr−1 | del Palacio et al. (2022) |
| Wind mean atomic weight | μWC = 4.0 | Typical (e.g., Cappa et al. 2004) |
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