https://phys.org/news/2018-08-image-sun-magnetic-field.html#jCp These fields are generated by the solar wind? By the sun spinning does it generate another mag field? Is this a good example of how hot objects loose their coherent magnetic field by misaligned temperature generated ad hoc domains making the overall magnetic field incoherent? Once the heat breaches the shell of the object the solar wind starts flowing and it disrupts the overall magnetic field. Earths core is hot and spins but the earth still has a coherent magnetic field is this because the heat hasn't penetrated the crust?