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Individual sheet: WR22
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Spectral type(s): WN7 + O9
Multiplicity:
Confirmed binary system
Period(s): 80.336 d
Orbital solution: yes
Ref: Rauw et al.(1996), Schweickhardt et al.(1999)
Comments:
The radio spectral index has been measured to lie between 0.0 and 0.6, with a rather large error bar compatible with a thermal or non-thermal emission (Leitherer et al. 1995). The nature of the radio emission is therefore uncertain.