AST222H1 Lecture Notes - Lecture 26: Blazar, Active Galactic Nucleus, Accretion Disk
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AST222H1 Full Course Notes
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Active galactic nuclei (agn) has no visible outward shape. Amount of light varies; sometimes has lighter & other times less light. Figure on this slide can be used to find the largest possible size. If a system varies in time, it must be less than the speed of light than delta t b/c the speed of light is finite. Around 0. 1 day is a regular time scale. We see the total amount of light coming out, if the area is large than the light can mix together. & will not fluctuate that much (would be averaged out) Squiggly lines in diagram is light varying up & down. Total overall luminosity of entire galaxy from an area the size of a solar system (forty times of. Luminosity of luminous qsos: l ~ 1047 ergs/s. Multiply by time to know how long an agn could last.
