Course : Εισαγωγή στη Ραδιοστρονομία
Course code : PH338C
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Display all units
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Introduction: What is radio astronomy
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Radiation mechanisms in the radio window
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Propagation through plasmas and the interstellar medium
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Antennas, beams, and single-dish observing
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Receivers, backends, digitization, and RFI
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Spectral-line radio astronomy
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Polarization and magnetic fields
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Pulsars and pulsar timing
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Transients, FRBs, surveys, and time-domain radio astronomy
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Interferometry I: the fundamental idea
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Interferometry II: calibration and imaging
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VLBI, astrometry, geodesy, and extreme angular resolution
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High-frequency radio astronomy: ALMA, sub-mm astronomy, and the EHT
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SETI, technosignatures, future facilities
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Introduction: What is radio astronomy
Antennas, beams, and single-dish observing
Lecture topics
Antenna effective area, aperture efficiency, gain, beam patterns, sidelobes, spillover, system temperature, receiver temperature, sky temperature. The radiometer equation. Position switching, frequency switching, beam switching, drift scans. Calibration basics.
Key concepts
Antenna temperature, system equivalent flux density, gain curves, beam efficiency, noise, integration time.