The mystery of the rings of the binary star WR-140 is solved.

The rings around binary star WR-140 formed because the O-type, very hot star travels across the Wolff-Ryat star's dust and gas. Or the thing that causes those rings is the solar winds of those stars colliding. And that forms the high-energy gas that causes the ring-shaped structure. 

(JWST image vs model of WR140. Credit: Left image: NASA/ESA/CSA/STScI/JPL-Caltech. Right image: Yinuo Han/Peter Tuthill/Ryan Lau"(ScitechDaily.com/Baffling “Spiderweb” Star Discovered – Is It an Alien Megastructure?)

"Raw and processed 3D model of WR140 shells after 18 orbits (or 144 years) of cyclic dust formation. Credit: Yinuo Han/Peter Tuthill/Ryan Lau" (ScitechDaily.com/Baffling “Spiderweb” Star Discovered – Is It an Alien Megastructure?)

So the rings have no alien origin. But the fact is that also cepheid stars or lone Wolff-Ryat stars can send gas rings around them. When the cepheid star pulsates its energy production changes. 

When the size of the star decreases pressure and temperature inside it increases. And nuclear fusion will increase. Then that rising energy production pushes the core of the star outwards. And even if the size of the star decreases when the pressure inside it decreases the high-energy gas continues its way through the universe. 

Or some neutron star or pulsar can form that kind of structure. When the energy pike from a pulsar hits the star. That thing increases its energy production. Also, things like white dwarfs that erupt at intervals of a certain time can form rings around the system.  In that case, rings can form straight from the white dwarfs. Or they can form when energy hits another component of the binary star. 

https://scitechdaily.com/baffling-spiderweb-star-discovered-is-it-an-alien-megastructure/