what is the Eddington Limit (cap for star luminosity)?
what are brown dwarfs? • Star Formation – sequence of formation, cloud collapse, phases, and the timescales (see next) • Important timescales – the Kelvin-Helmholtz timescale, cloud collapse timescale (or “free-fall” timescale); you show know characteristic numbers for these; Main Sequence timescale (fuel over consumption rate); you show know characteristic numbers for these (such as, the sun can live for 10 billion years, massive stars are more like tens and hundreds of millions of years, and lower mass stars are 100 billion and longer) • Stellar Evolution • know that the mass of a star is all-important for determing the type of star and its evolution • low mass stars have nuclear fusion of H in their cores ala the proton-proton chain, but high mass stars fuse H via the carbon cycle • know how convection can influence the lifetime of a star • know about the idea of evolutionary tracks in the HR Diagram • know that mass loss (stellar winds) affects the lifetime of stars because it al
