CAS AS 102 Study Guide - Final Guide: Corona, Solar Wind, Protostar
27 Mar 2014
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Document Summary
Temperature--> wien"s law and measuring the spectra in different colors. When we give electrons too much energy we ionize the atoms. Hotter stars have hotter atmospheres and vice versa. Most of the atmosphere is made of hydrogen and helium. The rest is heavy elements (anything beyond he) Stars that are really hot are blue, cold are red. There are more absorption lines in colder stars, because atmosphere colder, so the electrons are near the atmosphere (surface temperature will be colder). By the number of absorption lines we can determine the temperature of stars. Annie jump cannon came up with names and classification for stars. She based it on the surface temperature of stars. The hottest stars are called o stars, they have a surface temperature of 30,000 k. The coolest stars are called m stars, they have a surface temperature of 2,800 k. The type is g2: numbers go from 0-5.
