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SUMMARY:Quasars and Radio Galaxies - the most powerful sources of radio wa
 ves in the universe - Dr Julia Riley
DTSTART:20070508T190000Z
DTEND:20070508T200000Z
UID:TALK6944@talks.cam.ac.uk
CONTACT:4259
DESCRIPTION:Quasars and powerful radio galaxies are extraordinary objects 
 emitting up to 10 million times the power of our galaxy in the radio waveb
 and.  We can use them to test physical theories in extraordinary condition
 s unattainable in a laboratory.  The energy is believed to originate from 
 matter falling onto a massive black hole with a mass about one billion tim
 es that of the sun.  The observed differences between radio galaxies and q
 uasars can be attributed to relativistic effects - quasars are oriented at
  smaller angles to our line of sight and some of their emission is relativ
 istically beamed towards us.  Because they are so powerful we\ncan observe
  these objects at very large redshifts so they can be used to probe condit
 ions in the early Universe.
LOCATION:Pharmacology Lecture Theatre\, Tennis Court Road
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