The light dynamic between a fount A and a receiver B in uniform curvilinear motion relative v on the same reference point

In this kind of motion, the observer is always “at a rest” state in the center of the motion.

The observer on the source

In this case, the source is the center of the motion.

The photon

Photons emitted by source A, when the body B would be on position B₁, the photon that reaches B will describe AB trajectory with velocity c during a time t. In this same time t, the body B goes from position B₁to B with tangential velocity v. When this photon arrives at B, due to velocity v of B and aberration effect, it modifies its arrival direction from c to c₃.

The light ray

Photons emitted by source A, that will reach body B, during the body B trajectory from position B to B₂, will create a curve light ray connecting A to body B on the position B.

The observer on the receiver

In this case, the receiver is the center of the motion.

The photon

Photons emitted by the source on position A₁, the one that will arrive on body B when the source would be on position A, will go through the A₁B trajectory with velocity v in a time t. In this same time t, the source goes from position A₁ to A.

The light ray

Photons emitted by source A while it goes from position A₁ to A will create a curve light ray connecting the body B to body A.

When these photons, that will create a light ray from a source, are emitted always in the same direction, they produce a rectilinear light ray; but, if each photon direction shall be modify, in case of having a relative motion between the receiver and the source, the light ray become curve, in accordance with Paula effect.
However, we should have on mind that the photons trajectories are always in a straight line. The curve is made by the light ray between a source and a receiver when it exists a relative velocity between them which is not a deviation velocity.