why are low temperatures necessary for dense cores to form and contract into protostars?

Question by PAK ASIANS: why are low temperatures necessary for dense cores to form and contract into protostars?

Best answer:

Answer by lindajune
The main reason is that if the gas is hot it’s moving fast and the nebula or cloud won’t contract as easily as if the gas is relatively cool.
However, a gravitational wave or shockwave from a supernova can cause the gas in a nebula to contract to star forming stars, even if the temperature is too high for it contract on its own.

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