AST 309 Lecture Notes - Lecture 13: Interstellar Cloud, Stellar Wind, Open Cluster
Document Summary
The sun produces what type of spectrum? a. When would you receive the least amount of light from a binary star system of a. M5 red giant and an a5 main sequence star? a. When the red giant is in front of the ms star. The ionized part of the ism is best observed in what wavelength regime? a. Stellar groupings or associations - often called ob or t associations. They are not permanent associations and can change with time. Consider the bright/massive star betelgeuse in orion - it has likely moved over hundreds of light-years from where it was first born. Stars often disperse once the cloud and gas the formed out of has dispersed. The cloud was the glue that held the cluster/group of stars together, once the gas is gone the stellar group moves and dissolves. Open clusters of stars are more rare than associations, but likely originated in the massive ob associations.
