Close binary and other variable stars in the solar-age Galactic open cluster M 67

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Table 10:

Photometric parameters of detached system ES Cnc.
Parameter	van den Berg et al. (2001)	Sandquist et al. (2003)	Pribulla et al. (2008)	Present study
i ${({^\circ})}$	64(1)	68(1)	66.2	68.3(2.8)
$\Omega_1$	-	-	3.532	4.12(21)
$\Omega_2$	-	-	3.922	4.67(36)
a ( ${R}{_\odot}$ )	7.2(4)	-		6.629(144)
q	0.63(4)	-	0.68	0.777(16)
$V_\gamma$	0.63(4)	-		11(1)
T_Aa (K)	6480(25)	7325(50)	7325	7325(50)
T_Ab (K)	5450(40)	6000(200)	5543	5975(200)
$\left(\frac{l_1}{l_1 +l_2}\right)_V$	-	-		0.82
$\left(\frac{l_3}{l_{\rm total}}\right)_V$	-	-	0.68	0.42(15)
$\bar{r}_{1}$	-	-		0.309(21)
$\bar{r}_{2}$	-	-		0.222(18)
Spot parameters (spots on cool star):
Colatitude ${({^\circ})}$				92, 135
Longitude ${({^\circ})}$			179.9, 296.6	328, 57
Spot radius ${({^\circ})}$			11.5, 12.5	33, 30
Spot temperature ( $T_{\rm spot}/T_{\rm star}$ )			0.80, 0.80	0.83, 0.83
rms				0.175

Source LaTeX | All tables | In the text

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