|
Individual sheet: sigma Ori AB
|
Spectral type(s): O9.5V + B0.5V (+OB?)
Multiplicity:
A multi-component system: (Aa+Ab) + B
Period(s) : 143 d (for the Aa,Ab pair)
Orbital solution: yes (for the Aa,Ab pair)
Ref: Drake (1990), Simon-Diaz et al. (2015)
Quality flag (Q): I
Comments:
A clarification of its complex multiplicity is needed to discuss particle acceleration in this system. This is a well-established non-thermal radio emitter. The orbital elements of the long orbit (AB) are not known.