The magnetic field activity in a star can be very chaotic and my question is are they somehow related?
The factors that affect the shape of supernova remnants include:
- Interstellar medium (the gas and particles between stars)
- Planets that surrounded the star
- Magnetic field (in the same way magnetic fields cause auroras)
- Mass distribution of the star before supernova
There are probably more, but that's all I can think of at the moment
Not really, the shape of the supernova remnant is mainly caused by the structure and biometry of the star. At the time of explosion the layers of the star expands and high speeds which result in a supernova remnant. A good example is the crab nebula in constellation Taurus.