CAS AS 102 Lecture Notes - Hydrostatic Equilibrium, Coronal Hole, Photosphere
20 Jan 2014
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Document Summary
When an electron breaks free of an atom due to too much energy, it is called ionizing the electron. Some light leaving a star is absorbed by atoms in the star"s atmosphere. Hotter stars have hotter atmospheres, cooler stars have cooler atmospheres. Annie jump cannon came up with a system of classification for stars. She did it based on surface temperature of the stars. Stars names o b a f g k m. The hottest stars are called o stars, those are the hot blue stars. The coolest stars are called m stars, those are the small red stars. Lower numbers mean the hottest stars and vice versa. When two objects in orbit are very massive, they are going to orbit around the center of mass. A less massive star movies faster on larger orbit v1/v2=m2/m1. Spectroscopic binary: spectral lines of the two stars show periodic changes.
