Table 2: Polarization results of stars in Pismis 20.

Stara		 $P_{\rm max}$ $ \epsilon_{\rm p}$ $\sigma_1^{b}$ $\lambda_{\rm max}$ $\epsilon_{\lambda}$ Sp. T.
  %     $\mu$m    

1		 5.96 0.23 1.91 0.61 0.06 -
2 6.18 0.51 1.78 0.55 0.09 -
3 3.51 0.64 0.84 0.73 0.21 B0 I-III
4* 1.81 0.20 0.97 0.48 0.07 -
7 3.98 0.32 1.45 0.59 0.07 O9.5 Ib
8 6.17 0.12 1.23 0.57 0.02 B2 Ia-O
9 4.80 0.29 1.11 0.55 0.04 B0.2 III
10 6.95 0.28 2.14 0.58 0.05 -
11 6.46 0.11 0.78 0.56 0.02 O9.5Ib
12 3.91 0.37 0.52 0.48 0.05 -
13 6.57 0.16 2.36 0.57 0.03 O9 Vn
Vz14* 2.58 0.13 1.13 0.67 0.07 -
WR67 6.45 0.21 1.77 0.56 0.04 WN6 + OB?
Vz30* 1.68 0.13 1.30 0.57 0.06 -
Vz107* 1.99 0.17 1.50 0.56 0.09 -
Vz121 4.88 0.18 1.02 0.69 0.05 -
Vz128 4.06 0.07 0.51 0.76 0.03 -
Vz148 4.52 0.65 2.08 0.70 0.21 -
Vz182 5.71 0.04 0.63 0.56 0.01 -
Vz183* 2.23 0.25 1.42 0.69 0.14 -

a Identifications from Lyngå (1968) or from Vázquez et al. (1995; Vz). * Stands for nonmember.
b $ {\sigma_{1}}^2 = \sum {(r_{\lambda}/{\epsilon _{\rm p_{\lambda}})^2}}/(m-2)$; where m is the number of colors and $r_{\lambda} = P_{\lambda} - P_{\rm max}~\exp(-K~{\ln}^2({\lambda_{\rm max}/{\lambda}))}$.

Source LaTeX | All tables | In the text