Because the planet produces its own radiation. That much mass means this is less a “planet” and more of a proto star. It’s actually large enough to fuse deuterium if the right conditions were met. Pour enough hydrogen in there to raise the mass a three of four times what it has now and it’d be comparable to our sun.
So how come there’s an aurora when there’s no star to spray it with electromagnetic radiation?
Because the planet produces its own radiation. That much mass means this is less a “planet” and more of a proto star. It’s actually large enough to fuse deuterium if the right conditions were met. Pour enough hydrogen in there to raise the mass a three of four times what it has now and it’d be comparable to our sun.
better question, is a star required for EMR?
Nah, that’s a yes or no question, that’s a worse question. I want to know what’s causing the aurora, if not a star.