A Large Systematic Search for Close Supermassive Binary and Rapidly Recoiling Black Holes - III. Radial Velocity Variations

Jessie C. Runnoe, Michael Eracleous, Alison Pennell +7

We have been spectroscopically monitoring 88 quasars selected to have broad H$\beta$ emission lines offset from their systemic redshift by thousands of km s${}^{-1}$. By analogy with sin…