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Home All issues Volume 507 / No 3 (December I 2009) A&A, 507 3 (2009) 1555-1565 Full HTML
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Table 2:

Summary of physical and wind properties of AFGL 2298 for 2001-2007.
Epoch 2001 Jun. 2002 Aug. 2006 Jun. 2007 May
J 13.4 13.7 12.7 13.2
H 9.8 10.0 9.2 9.6
K 7.9 7.9 7.2 7.6
MH -9.85 -9.65 -10.45 -10.05
$T_{\ast}$ (kK) 12.5 15.5 11.0 11.5
$R_{\ast}$ ($R_{\odot}$) 262 158 385 312
$T_{\rm eff}$ (kK) 11.7 10.9 10.3 10.9
R2/3 ($R_{\odot}$) 300 320 444 353
BCH -0.85 -0.90 -0.55 -0.65
$L_{\ast}$/$L_{\odot}$ 1.5 $\times$ 106 1.3 $\times$ 106 2.0 $\times$ 106 1.5 $\times$ 106
$\dot{M}$ ($M_{\odot}$ yr-1) 4.5 $\times$ 10-5 1.2 $\times$ 10-4 5.2 $\times$ 10-5 4 $\times$ 10-5
$v_{\infty}$ km s-1 200 200 125 125
H/He 5 5 5 5

Note 1. For all epochs we have assumed DM = 15, E(B-V) = 9, AJ=8.25, AH=4.64, AK=2.69 (from Ueta et al. 2001) and H/He = 5.0, while $v_{\infty}$ $\sim $ 200 km s-1 was assumed for 2001-2002; these latter two parameters are given in italics. Mass-loss rates presented here are not corrected for wind clumping. We find errors of $\pm $2 kK ($\pm $0.2 mag in BC), $\pm $1.5 kK ($\pm $0.2 mag) and $\pm $0.5 kK ($\pm $0.1 mag) for 2001, 2002 and 2006-2007 respectively.


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