Ch 06-04 Radio Telescopes

• The two windows in the EM spectrum
  
   
• Single dish radio telescopes
   
  
   
  
  [The largest (100 m) steerable single-dish radio telescope in Effelsberg, Germany]
   
  
  [The 300-m non-steerable single-dish radio telescope in Arecibo, Puerto Rico]
   
  
  [FAST, the largest (500 m) non-steerable single-dish radio telescope in Guizhou, China]
   
  Recall that α = 1.22 λ/D (radian)
   
• Interferometers
  
   
• Arrays
  
  
  VLA, SMA, VSOP, ALMA SKA, VLBA, EHT
  (What is the spacial resolution they can achieve?)
  
  
  [The VSOP image of Quasar 1156+295 at 1.6 GHz (Science 281, 1825 (1998)).]