... shock[*]
However, the more recent detection of X-ray variability in intensity and spectrum makes it unlikely that this X-ray emission really originates in a wind bow shock, as pointed out by Grosso et al. (2005).
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... IDRS[*]
The IDRS data reduction software can be obtained from http://www.mpifr-bonn.mpg.de/staff/skraus/
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... Sequence[*]
With a dynamical age of ${\sim}3\times10^5$ yrs, it seems justified that the Trapezium stars are real ZAMS stars (Schulz et al. 2003), although the strong magnetic activity from $\theta ^1$Ori C was also associated with a pre-main-sequence origin (Donati et al. 2002).
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Copyright ESO 2007