Astronomy News

Like a Plasma Wake

This sounds something like an evolution of a wake to me. I could see the plasma, which I would guess would be rotating, coalesce into spherical masses or “balls”.

Here is the NASA description:
This four-panel graphic illustrates how the binary-star system V Hydrae is launching balls of plasma into space.

Panel 1 shows the two stars orbiting each other. One of the stars is nearing the end of its life and has swelled in size, becoming a red giant.

In panel 2, the smaller star’s orbit carries the star into the red giant’s expanded atmosphere. As the star moves through the atmosphere, it gobbles up material from the red giant that settles into a disk around the star.

The buildup of material reaches a tipping point and is eventually ejected as blobs of hot plasma along the star’s spin axis, as shown in panel 3.

This ejection process is repeated every eight years, which is the time it takes for the orbiting star to make another pass through the bloated red giant’s envelope, as shown in panel 4.