Course : Εισαγωγή στη Ραδιοστρονομία
Course code : PH338C
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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
SETI, technosignatures, future facilities
Lecture topics
Radio SETI history and modern technosignature searches. Narrowband signals, broadband leakage, Doppler drift, false positives, RFI, verification protocols, commensal searches. SETI as signal processing and extreme anomaly detection. Comparison between SETI and pulsar/FRB pipelines.
Future directions: SKA, ngVLA, ARGOS-style arrays, low-frequency cosmology, lunar farside concepts, intensity mapping, AI-assisted searches, commensal observing.
Key concepts
Technosignature, narrowband search, Doppler drift, RFI rejection, on/off source tests, commensal observing.