|
Individual sheet: Cyg OB2-8A
|
Spectral type(s): O6If + O5.5III(f)
Multiplicity:
Confirmed binary system
Period(s) : 21.908 d
Orbital solution: yes
Ref: De Becker et al.(2004)
Quality flag (Q): I
Comments:
This is the shortest period system in the catalogue with strong evidence for non-thermal radio emission varying with the known period (Blomme et al.2010).
Details about its thermal X-ray emission can be found in De Becker et al. (2006b).
Upper limits on the hard X-ray emission based on INTEGRAL observations have been published in De Becker et al. (2007).