View Full Version : Protostars and Accretion Discs

2014-Jun-08, 02:53 PM
When I picture stellar formation, it is easiest to imagine just one star.

Are there cases of one accretion disc producing two stars? Are there cases where two stars have separate discs that interact with each other?

Jeff Root
2014-Jun-08, 04:23 PM
I'm not sure what the definition of an "accretion disk" is, but I
generally see that term in connection with existing black holes
or stars. The disk surrounding a forming star is called a
"protostellar disk", "protoplanetary disk", or "proplyd".

It seems inescapable that the very large population of close
binary and higher-numbered multiple star systems means they
were mostly born out of the same protostellar disk. But I don't
know what has actually been observed.

I think a protostellar disk typically contains over 100 solar
masses of gas and dust, so plenty of matter to form multiple

-- Jeff, in Minneapolis