I'm reading on this website here and will be using lots of quotes from it.
Astronomers using a telescope in Chile have observed a hypergiant star shedding massive amounts of mass, suggesting it is about to end its relatively short life in a massive supernova explosion. The red hypergiant star VY Canis Majoris, one of the largest stars ever found in the Milky Way, is losing enormous amounts of its mass as it deteriorates, they say. It is 30 to 40 times as massive as our sun and 300,000 times as bright. If it sat in the center of our solar system, it would encompass the orbit of Jupiter.
This interested me so I kept reading,
Radiation pressure is the force exerted by starlight, and is very weak, which is why only large dust grains have enough surface area to be affected and cause the star to lose mass, the researchers say. VY Canis Majoris, around 3,800 light-years away from us, is expelling an amount of dust and gas every year equal to 30 times the mass of the Earth, they say.
As the star died wouldn't the radiation pressure decrease? Less fusion = less radiation = less radiation pressure right? Why does increase of radiation pressure cause gas and dust to be pushed out of the star.