Via the Huffington Post, evolutionary anthropologist Cadell Last argues that we are failing to recognize what we see:
Philosopher (and systems theorist) Clément Vidal has pointed out that there are certain binary star systems that astrophysicists have had difficulty explaining with conventional astrophysical models. These binaries are semi-detatched stars that exhibit an energy flow that is irregular, but not out of control. Vidal argues that instead of an astrophysical model, we need an astrobiological model to describe these strange systems.
In essence Vidal is claiming that these systems are not typical binary stars, but rather civilizations that have advanced well passed a Type 1 civilization on the Kardashev scale and are now actively feeding on their parent star. He calls these hypothetical civilizations starivores. And if he is right… then there are approximately 2,000 known starivores in our galaxy alone.
Perhaps, the necessary test is related to understanding the nature of the binary systems “metabolism.” Metabolism is one of the fundamental and necessary conditions for complex living systems because it allows them to draw and sustain order from the surrounding non-living chaos. So if these binary systems are actually intelligent civilizations feeding on their parent star then we should expect a degree of energy flow control that cannot be described by the laws of physics alone.