Seldom Bucket
Well-Known Member
In the Milky Way, the formation rate of stars is about one solar mass every year. About 10 billion years ago, it was ten solar masses every year. What happened?
Stars are born in giant molecular clouds (GMCs), and astronomers think that the environment in galaxies affects these clouds and their ability to spawn new stars. Sometimes the environment is so extreme that entire galaxies stop forming new stars.
Astronomers call this “quenching,” and they want to know what causes it.
Galactic quenching is one of astrophysics’ long-standing mysteries. Astronomers and astrophysicists have studied the phenomenon in detail and come up with different possible explanations.
What's Snuffing Out Galaxies Before Their Time?
Some galaxies have stopped forming new stars in a process called galactic quenching. Why that happens is unclear, but a new survey might contain an answer.
www.universetoday.com