Here's the real published paper http://arxiv.org/pdf/1509.03622v1.pdf
Checkout all the cool graphs!
I also don't see any mention of an alien structure in the document...
Quote:
Our most promising theory invokes a family of exocomets. One way we imagine such a barrage of comets could be triggered is by the passage of a field star through the system. And, in fact, as discussed above, there is a small star nearby (∼ 1000 AU; Section 2.3) which, if moving near to KIC 8462852, but not bound to it, could trigger a barrage of bodies into the vicinity of the host star. On the other hand, if the companion star is bound, it could be pumping up comet eccentricities through the Kozai mechanism. Measuring the motion/orbit of the companion star with respect to KIC 8462852 would be telling in whether or not it is associated, and we would then be able to put stricter predictions on the timescale and repeatability of comet showers based on bound or unbound star-comet perturbing models. Finally, comets would release gas (as well as dust), and sensitive observations to detect this gas would also test this hypothesis.