A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the super-massive black hole Sgr A* revealed two new binaries ; a long-period Ofpe/WN9 binary , GCIRS 16NE , with a modest eccentricity of 0.3 and a period of 224 days and an eclipsing Wolf-Rayet binary with a period of 2.3 days .
Together with the already identified binary GCIRS 16SW , there are now three confirmed OB/WR binaries in the inner 0.2 pc of the Galactic Center .
Using radial velocity change upper limits , we were able to constrain the spectroscopic binary fraction in the Galactic Center to F _ { SB } = 0.27 ^ { +0.29 } _ { -0.19 } at a confidence level of 95 \% , a massive binary fraction similar to that observed in dense clusters .
The fraction of eclipsing binaries with photometric amplitudes \Delta m > 0.4 is F ^ { GC } _ { EB } = 3 \pm 2 \% , which is consistent with local OB star clusters ( F _ { EB } = 1 \% ) .
Overall the Galactic Center binary fraction seems to be close to the binary fraction in comparable young clusters .