High-resolution spectroscopy for Cepheids distance determination - V. Impact of the cross-correlation method on the p-factor and the γ-velocities

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Volume 502 / No 3 (August II 2009)

A&A, 502 3 (2009) 951-956

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Table 2:

The projection factor ( $p_{{\rm cc}}$ ) and the $\gamma$ -velocities ( $V_{\gamma }$ [CC]) derived from the CC radial velocity curves.
Name	p(a)	${\Delta RV_{\rm cc}}$	$f_{{\rm cc}}$	$p_{{\rm cc}}$	$V_{\gamma }$ [GCD](b)	$V_{\gamma }$ [N08](c)	$V_{\gamma }$ [CC]
		[km s^-1]			[km s^-1]	[km s^-1]	[km s^-1]
R TrA	$1.35 _{\pm 0.03 }$	$30.6 _{\pm 0.6 }$	$0.93 _{\pm 0.03 }$	$1.25 _{\pm 0.07 }$	$-13.2 _{\pm 2.0 }$	$-11.3 _{\pm 0.3 }$	$-12.2 _{\pm 0.6 }$
S Cru	$1.34 _{\pm 0.03 }$	$35.9 _{\pm 0.6 }$	$0.93 _{\pm 0.03 }$	$1.25 _{\pm 0.07 }$	$-7.1 _{\pm 2.0 }$	$-3.5 _{\pm 0.4 }$	$-4.7 _{\pm 0.6 }$
Y Sgr	$1.33 _{\pm 0.03 }$	$36.0 _{\pm 0.5 }$	$0.95 _{\pm 0.03 }$	$1.26 _{\pm 0.05 }$	$-2.5 _{\pm 2.0 }$	$-1.5 _{\pm 0.2 }$	$-2.4 _{\pm 0.5 }$
$\beta$ Dor	$1.32 _{\pm 0.02 }$	$33.5 _{\pm 0.2 }$	$0.94 _{\pm 0.02 }$	$1.24 _{\pm 0.05 }$	$7.4 _{\pm 2.0 }$	$9.8 _{\pm 0.1 }$	$8.7 _{\pm 0.2 }$
$\zeta$ Gem	$1.31 _{\pm 0.02 }$	$27.2 _{\pm 0.2 }$	$0.94 _{\pm 0.03 }$	$1.23 _{\pm 0.05 }$	$6.9 _{\pm 2.0 }$	$7.1 _{\pm 0.1 }$	$6.4 _{\pm 0.2 }$
RZ Vel	$1.30 _{\pm 0.02 }$	$52.5 _{\pm 0.7 }$	$0.91 _{\pm 0.02 }$	$1.18 _{\pm 0.05 }$	$24.1 _{\pm 2.0 }$	$24.6 _{\pm 0.4 }$	$24.4 _{\pm 0.7 }$
$\ell$ Car	$1.28 _{\pm 0.02 }$	$34.3 _{\pm 0.2 }$	$0.96 _{\pm 0.02 }$	$1.22 _{\pm 0.04 }$	$3.6 _{\pm 2.0 }$	$4.4 _{\pm 0.1 }$	$3.6 _{\pm 0.2 }$
RS Pup	$1.27 _{\pm 0.02 }$	$46.9 _{\pm 0.5 }$	$0.90 _{\pm 0.02 }$	$1.16 _{\pm 0.04 }$	$22.1 _{\pm 2.0 }$	$25.7 _{\pm 0.2 }$	$25.8 _{\pm 0.5 }$

^a The projection factor as derived in Paper II. ^b The $\gamma$ -velocities derived from the Galactic Cepheid Database (Fernie et al. 1995). ^c The $\gamma$ -velocities or calibrated center-of-mass velocities of the stars from Paper III.

Source LaTeX | All tables | In the text

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