Several important stellar, orbital and stellar-wind parameters of the η Car binary system and their values as determined by various studies.
|d||2.3 ± 0.1 kpc||Davidson & Humphreys (1997)|
|P||2024 ± 2 d||Corcoran et al. (2005)|
|i||45°||Okazaki et al. (2008)|
|e||0.9||Smith et al. (2004)|
|Φ||27°||Okazaki et al. (2008)|
|0−30°||Parkin et al. (2009)|
|a||15.4 AU||Corcoran (2001)|
|M A||90 M⊙||Hillier et al. (2001)|
|M B||30 M⊙||Verner et al. (2005)|
|Ṁ A||10-3M⊙ yr-1||Hillier et al. (2001)|
|2.5 × 10-4M⊙ yr-1||Pittard & Corcoran (2002)|
|Ṁ B||10-5M⊙ yr-1||Pittard & Corcoran (2002)|
|1.5 × 10-5M⊙ yr-1||Parkin et al. (2009)|
|V ∞, A||500 km s-1||Hillier et al. (2001)|
|V ∞, B||3000 km s-1||Pittard & Corcoran (2002)|
Notes. P and d are the orbital period and the distance from the Earth. i, e and a are inclination angle, eccentricity and semi-major axis. The parameter Φ represents the angle between the projection of the orbital plane along the line of sight and the apastron side of the semi-major axis in the prograde direction: Φ = 270°−ω, with ω being the commonly used periastron longitude angle. M, Ṁ and V∞ are stellar mass, mass-loss rate and terminal velocity of the stellar wind for the stars A and B in the system.
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