ASTR BC 1754y Lecture Notes - Lecture 31: Invariant Mass, Special Relativity, Accretion Disk
26 Aug 2016
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Special relativity- reference frames have to be non-accelerating. Rest mass + you moving = more mass. The three star picture with the black hole shows the projected stars that we see instead of the real star because the light bends. Curved line because moving faster through space than time. Universe looks flat but because we think it"s expanding then it should be open. Mass of galaxies- use rotation curve (speed v distance) When the graph plateaus it means dark matter. Hubble"s law = observational evidence for big bang. Use geometric approach to light bending to measure curvature of universe. Look back at homework about galaxy collisions and tails. Look at first review file for info on light and kepler. How do we know mass of agn- how much light comes out is related to how much mass has dropped into accretion disk.
