Table 9: Disk and accretion properties a in $\sigma $ Ori and $\lambda $ Ori
  Disk Thick H$\alpha $ HeI other active active
    Disk width b 6678 Å lines disk (H$\alpha $) c disk (He I) d
$\sigma $ Ori 52 $\pm$ 9% 45 $\pm$ 8% 42 $\pm$ 8% 35 $\pm$ 7% 37 $\pm$ 8% 78 $\pm$ 16% 65 $\pm$ 14%
  (34/65) (29/65) (25/60) (22/63) (23/63) (25/32) (22/34)
$\lambda $ Ori 28 $\pm$ 8% 18 $\pm$ 7% 10 $\pm$ 5% 7 $\pm$ 4% 12 $\pm$ 5% 40 $\pm$ 20% 27 $\pm$ 16%
  (11/40) (7/40) (4/39) (3/43) (5/43) (4/10) (3/11)
               
a: Errors are calculated as $\sqrt{N}$/total.  
b: H $\alpha_{10\%}>$200 km s-1.  
c: Stars harbouring a circumstellar disk with H $\alpha_{10\%}>$200 km s-1.  
d: Stars harbouring a circumstellar disk with He I in emission.  


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