How does a region of a cloud initiate star formation, according to the physics described for $ ext{Sgr B2}$?
Answer
Self-gravity overcomes the outward pressure from thermal motion and turbulence
The fundamental mechanism for star formation, whether in the quiet spiral arms or the intense $ ext{Sagittarius B2}$ region, involves a battle between inward and outward forces. Stars are born when a specific region within a molecular cloud accumulates sufficient mass that its inherent gravitational pull, known as self-gravity, successfully dominates and overcomes the restorative outward pressure generated by the internal thermal motion of the gas particles and any localized turbulence within the cloud structure.
Related Questions
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