|
Hi Patrick
I'm not an expert, but from what I remember Brown dwarfs are the same size as Jupiter but have more mass and generate more heat than what Jupiter does and they are visible in Infrared only. For the dwarf to start the fusion of Hydrogen its diameter would have to increase at least 10 times or more, in which case it would no longer be called a brown dwarf.
As for the 100,000 years for light to pass through the star, I believe that figure is for our Sun, so it would vary depending on the final diameter of the Star.
Cheers
Bill
|