Soap Bubble HO3RGB Image Showing White Dwarf (Eric Coles (coles44))

Soap Bubble HO3RGB Image Showing White Dwarf

One of my imaging friends pointed out that you could see the white dwarf of the exploded star that formed the Soarp Bubble. Here is a description of the relationship between a planetary nebula and a white dwarf. This is the reference.(http://cse.ssl.berkeley.edu/bmendez/ay10/2000/cycle/planetarynebula.html )

As an aging red supergiant becomes more and more luminous, the outer layers puff out more and more. It gets to the point where the star loses gravitational hold on its outer layers and they get pushed away the pressure exerted by the stellar wind and by the photons leaving the core. (Yes, light can exert a pressure!)

These shed outer layers are called a planetary nebula. As this planetary nebula continues to drift away, it becomes a part of the interstellar medium.

What is left behind is a degenerate core made of carbon and oxygen. There's not enough mass in the core to collapse the core any further. It will therefore never be hot enough to fuse carbon or oxygen to make any heavier elements.

This hot ball of carbon and oxygen, held up by degeneracy pressure, is called a white dwarf.

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