Naturally, I started off with my prompt.
After a while, I was already having doubts that planets might be too lightweight to have any bearing at all to affect any potential supernova.
- And then a professional Astronomer takes the bait! :)
And there you have it. The axe.
If Brown Dwarfs don't even have enough mass to trigger a supernova (in context with the article ), then mere planets won't have significant effects to do so.
But we have a consolation. :)
And until then that the WD keeps stripping the BD till it becomes a planet, we will never know whether that "planet" made any impact at all.
Which brings us to one interesting object: A Cataclysmic Variable named AE Aquarii that is within a Binary System.