AST201H5 Chapter Notes - Chapter 13: Solar Mass, Star System, Fusion Power
Document Summary
Disks and jets: star formation = dynamic process contracting matter must conserve angular momentum, so as r decreases, v increase rapidly rotating disks. Stellar mass limits: stellar masses range only from 0. 1 to 100 msun because. M > 100msun fusion produces too much heat and pressure for g to hold it together disintegrates. M < 0. 1 msun g too weak for fusion to begin powered only by e from contraction (eg thermal: creates faint, cool brown dwarfs. Life depends on fusion in the core (unobservable: must use theory (g pressure fusion e + heat pressure, use a computer to calculate how star changes with time as fusion converts h he. Density changes changes pressure changes t changes fusion: predicts star"s appearance (surface) compared to observations of star clusters. M 0. 1x -100x msun: < 2 msun low mass star, 2 8 msun intermediate mass star, 8 msun high mass star.
