AST201H5 Lecture Notes - Lecture 19: Isotopes Of Nitrogen
Document Summary
Tuesday"s class: the lives of stars are studied by using theory, compute their interior structure, compare predictions to star clusters, fusion of h into he changes the composition, density, pressure, temperature, rate of fusion, all change and increase the star"s age and repeat, low mass stars (less than or equal to 2msun)= most stars including our sun, rate of fusion depends on temperature and pressure (varies with distance from the centre to the core, centre of core runs out of h first(cid:224) star needs to adjust. Adjustments of a low mass star: when there is no h remaining in the cores centre, no fusion(cid:224) no new energy or heat, pressure drops, core begins to shrink under the star"s weight, outer core with h fuel is pulled in, greater pressure than before(cid:224) more fusion than before (cid:224) higher temperature than before, more radiation produced in the core.
