Table 1
Parameters of the Cepheid and its close companion.
| Primary (Cepheid) | Secondaryf | ||||||||||||
a
|
b
|
b
|
Sp. Typec | P pul c |
d
|
d e | Sp. Type | P orb | T 0 | e | a1sini | ω | f(M) |
| (days) | (mas) | (pc) | (days) | (days) | (AU) | (rad) | (M⊙) | ||||||
|
|
|||||||||||||
| 5.89 | 3.76 | 3.85 | F8II | 5.2733 | 0.76 | 500 | B6V | 6532 | 2 448 500 | 0.19 | 6.05 | 4.03 | 0.68 |
Notes. ,
,
: mean
apparent V, K and H magnitudes. Sp.
Type: spectral type. Ppul: period of pulsation.
: mean
angular diameter. d: distance. Porb:
orbital period. T0: time passage through periastron.
e: eccentricity of the orbit.
a1 sini: projected semi-major axis of
the orbit of the Cepheid about the center of mass of the system. ω:
argument of periastron. f(M): spectroscopic mass
function.
Reference.
From the 2MASS catalog (Cutri et al. 2003).
From Samus et al. (2009).
From Gallenne et al. (2011, at φ = 0.27.
From the K-band P-L relation of Storm et al. (2011).
From Evans (2000) and Petterson et al. (2004).
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