Table 1
Parameters of the massive stars driving the two bow shocks.
| BD+43° 3654 | BD+60° 2522 | Refs. | |
|---|---|---|---|
| RAJ2000 | 20h33m36.s8 | 23h20m44.s5 | (1) |
| DecJ2000 | +43°59′7″.4 | +61°11′40″.5 | (1) |
| Spec. type | O4If | O6.5(n)fp | (2), (3) |
| d (kpc) | 1.72 ± 0.03 | 3.0 ± 0.2 | (1) |
| M⋆ (M⊙) | 70 ± 15 | 39 ± 10 | (4), (5) |
| υtr (km s−1) | 43 ± 1 | 28 ± 1 | (1) |
| υr (km s−1) | [−54, 90] | [6, 28] | (6), (7) |
| υ⋆ (km s−1) | [69, 100] | [29, 40] | (5) |
| M (M⊙ yr−1) | 9 × 10−6 | 1.3 × 10−6 | (8), (9) |
| υ∞ (km s−1) | 2300 | 2000 | (4), (9) |
| nH (cm−3) | 15 | 50 | (8), (7) |
| RSO (′) | 2.72 | 0.42 | (5) |
Notes. RSO is the calculated standoff distance of the bow shock for the given parameters, d, υ, υ∞, M, and nH.
References. (1) Gaia Collaboration (2021), (2) Maíz Apellániz et al. (2016), (3) Sota et al. (2011), (4) Comerón & Pasquali (2007), (5) this work, (6) Kobulnicky et al. (2010), Gaia Collaboration (2018), (7) Green et al. (2019), (8) Toalá et al. (2020), (9) del Palacio et al. (2018).
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