Pulsar Pair Bends Space-Time
According to Dr. Ingrid Stairs, a professor of Physics and Astronomy at the University of British Columbia, at least one of the stars is a pulsar - a fast-spinning, radiation-emitting neutron star. The second may also be a neutron star, or possibly a white dwarf. The two are closer to each other than Mercury is to our Sun, and orbit each other in just days.
Their powerful gravitational fields are interacting in a way that is bending space-time, which we see as an increase in the wobble of the pulsar. The result is that the radiation jet from the pulsar, which we see in our telescopes as a repeating flash, is being gradually directed away from us, so that we can now barely see it.