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

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Volume 503 / No 1 (August III 2009)

A&A, 503 1 (2009) 165-176

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Table 13:

Astrophysical parameters for the close binaries AH Cnc and ES Cnc.
		AH Cnc		ES Cnc
Quantity	Unit	Pri.	Sec.	Pri.	Sec.
Mass (M)	$M_{\odot}$	1.47 (15)	0.25 (3)	1.94 (13)	1.50 (9)
Radius (R)	${R}{_\odot}$	1.40 (9)	0.68 (5)	2.05 (7)	1.47 (6)
Effective Temperature ( $T_{\rm e}$ )	$\rm {K}$	6300	6275 (90)	7325 (50)	5975 (200)
Luminosity(L)	${L_{\odot}}$	2.78 (50)	0.64 (11)	10.8 (7)	2.5 (6)
Surface Gravity (log g)	cgs	4.31	4.17	4.10	4.28
Bolometric Magnitude ( $M_{\rm bol}$ )	mag	3.64	5.23	2.16	3.77
Visual Magnitude (V)	mag	13.60	15.19	12.05	13.80
Absolute Magnitude (M_V)	mag	3.80	5.39	2.25	3.95
Bolometric Correction (B.C.)	mag	-0.16	-0.16	-0.09	-0.18
Period Change Rate ( $\dot{P}$ )	d yr^-1	$+3.7 \times 10^{-7}$		$+5.1 \times 10^{-10}$
Mass Transfer Rate ( $\dot{M}$ )	$M_{\odot}$ yr^-1	$+9.4 \times 10^{-8}$
Distance (d)	pc			857(33)

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