Spectroscopic monitoring of the luminous blue variable Westerlund1-243 from 2002 to 2009

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Table 3:

Model parameters for W243.
Parameter	Value^a
L_*	$7.3\times10^{5}~(d/4.5~{\rm kpc})^{2}~L_{\odot}$
R_*	$376.9~(d/4.5~{\rm kpc})~R_{\odot}$
R_2/3	$450.0~(d/4.5~{\rm kpc})~R_{\odot}$
$T_{{\rm eff}}$	$\sim$ 8500 K^b
$\dot{M}$	6.1 $\times$ $10^{-7}~(d/4.5~{\rm kpc})^{1.5}~M_{\odot}$ yr^-1
$V_{\infty}$	165 km s^-1
$v~ \sin i$	10 km s^-1
log g	$\sim$ 0.65^c
H/He	5
N/N $_{\odot}$	12.1
O/O $_{\odot}$	0.11
Ca/Ca $_{\odot}$	2.49
Mg/Mg $_{\odot}$	1.34
Si/Si $_{\odot}$	1.51
Fe/Fe $_{\odot}$	1.22

^a Values for $V_{\infty}$ , $v~{\rm sin}i$ and H/He are assumed, all others are derived. Values are for a distance of 4.5 kpc (Clark et al. 2005; Crowther et al. 2006), with scaling listed where appropriate.
^b Limits are 8300 $\le$ $T_{{\rm eff}}$ $\le$ 9300 K, favouring a value at the lower end of this range.
^c Best fit to the higher Paschen-series absorption lines.

Source LaTeX | All tables | In the text

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