Quote:
Originally Posted by timb
Not necessarily. Older stars tend to rotate slower because they have had longer to lose angular momentum, but stars of similar age can have very different rotational periods. The fastest ones would be close to the maximum, ie any faster and they'd start throwing rings.
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Yes, I have just begun reading about this sort of thing in a book: "The Birth of Stars and Planets" , Baily & Reipurth (2006). It is believed that the intermediate mass stars are too hot for much of a convective zone so it, apparently, does not have disk brakes no matter how hard it stomps on the pedal.
[The convective zone is believed to be the key to strong magnetic fields that cause disk interaction and braking.]
I'd love to get other recommendations for good reads on star birth, especially more on the Class 0 and Class 1 protostars.