AST 101 Lecture Notes - Lecture 18: Strong Interaction, Solar Mass, Electroweak Interaction
Document Summary
Merger leads to new star formation uses up or blows out remaining gas. Giant elliptical galaxies reside at center of many galaxy cluster. Center of galaxy is unusually bright = active galactic nucleus (agn) Highly redshifted spectra of quasars indicate large distances. From brightness and distance, we find that luminosities of some quasars are. Variability shows that all this energy comes from region smaller than solar system. Quasars powerfully radiate energy over very wide range of wavelengths, indicating that they contain matter with a wide range of temperatures. Active galactic nuclei are sometimes associated with jets. Contain active nuclei shooting out vast jets of plasma, which emit radio waves coming from electrons moving at near light speed lobes of radio galaxies can extend over hundreds of millions of light years. Radio galaxies don"t appear as quasars because dusty gas clouds block our view of their inner most regions.