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Lecture 12 Radio Astronomy - Coggle Diagram
Lecture 12 Radio Astronomy
radio astronomy basics
emission mechanisms
thermal: in janskey, CMB
Bremsstralung, Synchrotron(polarized)
HI, molecular lines, recombination lines
astrophysical sources
blackbody
continuum sorces
spectral line sources
radio telescopes & detectors
telescopes and components
always diffraction limited
detection of waves
reflectors, feed horn, low-noise amplifier, filter, downconverter, IF amplifier, spectrometer
detectors and back-end signal processing
frequency shift
Superheterodyne
do FT
key characteristics, units, polarization
noise temperature
system temperature
radiometer equation
side lobes
interferometry
aperture synthesis, two telescope interferometry
fringe patterm
baseline, uv plane, visibility
do FT
earth rotation brings more data points
convert between baseline and uv plane
do inverse FT