Ebook: Classics in Radio Astronomy

Radio techniques were the nrst to lead astronomy away from the quiescent and limited Universe revealed by traditional observations at optical wave­ lengths. In the earliest days of radio astronomy, a handful of radio physicists and engineers made one startling discovery after another as they opened up the radio sky. With this collection of classic papers and the extensive intro­ ductory material, the reader can experience these exciting discoveries, as well as understand the developing techniques and follow the motivations which prompted the various lines of inquiry. For instance he or she will follow in detail the several attempts to detect radio waves from the sun at the turn of the century; the unravelling by Jansky of a "steady hiss type static"; the incredible story of Reber who built a 9 meter dish in his backyard in 1937 and then mapped the Milky Way; the vital discoveries by Hey and colleagues of radio bursts from the Sun and of a discrete source in the constellation of Cygnus; the development of receivers and interferometry in the post-war years by the groups led by Ryle in Cambridge and Pawsey in Sydney; the nrst measurements and exciting identiftcations of Taurus A (the Crab Nebula), Centaurus A, Virgo A, Cassiopeia A, and Cygnus A, the last opening the neld of radio cosmology; the early development of synchroton theory; and the prediction and discovery seven years later of the 21 cm line of neutral hy­ drogen.

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Content:
Front Matter....Pages i-xxiv
Front Matter....Pages 1-3
Directional Studies of Atmospherics at High Frequencies....Pages 10-22
Electrical Disturbances Apparently of Extraterrestrial Origin....Pages 23-35
A Note on the Source of Interstellar Interference....Pages 36-41
Cosmic Static....Pages 46-55
Cosmic Static....Pages 56-60
Cosmic Static....Pages 61-69
Cosmic Static....Pages 70-79
Interstellar Radiation from Free Electrons and Hydrogen Atoms....Pages 81-87
Cosmic Rays as the Source of General Galactic Radio Emission....Pages 90-92
Cosmic Rays as the Source of Galactic Radio Emission....Pages 93-99
Front Matter....Pages 101-103
The Measurement of Thermal Radiation at Microwave Frequencies....Pages 106-113
A New Radio Interferometer and Its Application to the Observation of Weak Radio Stars....Pages 116-140
Front Matter....Pages 141-144
On an Attempt to Detect Electrodynamic Solar Radiation and on the Change in Contact Resistance When Illuminating Two Conductors by Electric Radiation....Pages 147-157
A Search for Hertzian Waves Emanating From the Sun....Pages 158-160
On the Search for Hertzian Radiation Emanating from the Sun....Pages 161-163
Solar Radiations in the 4–6 Metre Radio Wave-Length Band....Pages 166-167
Microwave Radiation from the Sun....Pages 168-181
Solar Radiation on 175 Mc./s.....Pages 184-187
Solar Radiation at Radio Frequencies and Its Relation to Sunspots....Pages 188-207
Temperature Radiation from the Quiet Sun in the Radio Spectrum....Pages 210-214
Front Matter....Pages 141-144
Erratum to: Microwave Radiation from the Sun....Pages 350-350
Observation of Million Degree Thermal Radiation from the Sun at a WaveLength of 1.5 Metres....Pages 215-216
Microwave Radiation from the Sun and Moon....Pages 218-219
Front Matter....Pages 221-223
Fluctuations in Cosmic Radiation at Radio-Frequencies....Pages 228-230
Variable Source of Radio Frequency Radiation in the Constellation of Cygnus....Pages 231-233
A New Intense Source of Radio-Frequency Radiation in the Constellation of Cassiopeia....Pages 234-238
Positions of Three Discrete Sources of Galactic Radio-Frequency Radiation....Pages 239-241
Cosmic Radiation and Radio Stars....Pages 243-244
An Accurate Determination of the Positions of Four Radio Stars....Pages 248-250
Identification of the Radio Sources in Cassiopeia, Cygnus A, and Puppis A....Pages 251-272
Apparent Angular Sizes of Discrete Radio Sources....Pages 275-281
Observations at Sydney....Pages 282-287
Observations at Cambridge....Pages 287-290
Fine Structure of the Extra-terrestrial Radio Source Cygnus I....Pages 291-295
Front Matter....Pages 297-298
Origin of the Radio Waves from Space....Pages 302-316
Monochromatic Radio Emission from the Galaxy and the Possibility of its Observation....Pages 318-324
Observation of a Line in the Galactic Radio Spectrum....Pages 328-330
The Interstellar Hydrogen Line at 1,420 Mc./sec., and an Estimate of Galactic Rotation....Pages 331-335
Back Matter....Pages 337-349

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Content:
Front Matter....Pages i-xxiv
Front Matter....Pages 1-3
Directional Studies of Atmospherics at High Frequencies....Pages 10-22
Electrical Disturbances Apparently of Extraterrestrial Origin....Pages 23-35
A Note on the Source of Interstellar Interference....Pages 36-41
Cosmic Static....Pages 46-55
Cosmic Static....Pages 56-60
Cosmic Static....Pages 61-69
Cosmic Static....Pages 70-79
Interstellar Radiation from Free Electrons and Hydrogen Atoms....Pages 81-87
Cosmic Rays as the Source of General Galactic Radio Emission....Pages 90-92
Cosmic Rays as the Source of Galactic Radio Emission....Pages 93-99
Front Matter....Pages 101-103
The Measurement of Thermal Radiation at Microwave Frequencies....Pages 106-113
A New Radio Interferometer and Its Application to the Observation of Weak Radio Stars....Pages 116-140
Front Matter....Pages 141-144
On an Attempt to Detect Electrodynamic Solar Radiation and on the Change in Contact Resistance When Illuminating Two Conductors by Electric Radiation....Pages 147-157
A Search for Hertzian Waves Emanating From the Sun....Pages 158-160
On the Search for Hertzian Radiation Emanating from the Sun....Pages 161-163
Solar Radiations in the 4–6 Metre Radio Wave-Length Band....Pages 166-167
Microwave Radiation from the Sun....Pages 168-181
Solar Radiation on 175 Mc./s.....Pages 184-187
Solar Radiation at Radio Frequencies and Its Relation to Sunspots....Pages 188-207
Temperature Radiation from the Quiet Sun in the Radio Spectrum....Pages 210-214
Front Matter....Pages 141-144
Erratum to: Microwave Radiation from the Sun....Pages 350-350
Observation of Million Degree Thermal Radiation from the Sun at a WaveLength of 1.5 Metres....Pages 215-216
Microwave Radiation from the Sun and Moon....Pages 218-219
Front Matter....Pages 221-223
Fluctuations in Cosmic Radiation at Radio-Frequencies....Pages 228-230
Variable Source of Radio Frequency Radiation in the Constellation of Cygnus....Pages 231-233
A New Intense Source of Radio-Frequency Radiation in the Constellation of Cassiopeia....Pages 234-238
Positions of Three Discrete Sources of Galactic Radio-Frequency Radiation....Pages 239-241
Cosmic Radiation and Radio Stars....Pages 243-244
An Accurate Determination of the Positions of Four Radio Stars....Pages 248-250
Identification of the Radio Sources in Cassiopeia, Cygnus A, and Puppis A....Pages 251-272
Apparent Angular Sizes of Discrete Radio Sources....Pages 275-281
Observations at Sydney....Pages 282-287
Observations at Cambridge....Pages 287-290
Fine Structure of the Extra-terrestrial Radio Source Cygnus I....Pages 291-295
Front Matter....Pages 297-298
Origin of the Radio Waves from Space....Pages 302-316
Monochromatic Radio Emission from the Galaxy and the Possibility of its Observation....Pages 318-324
Observation of a Line in the Galactic Radio Spectrum....Pages 328-330
The Interstellar Hydrogen Line at 1,420 Mc./sec., and an Estimate of Galactic Rotation....Pages 331-335
Back Matter....Pages 337-349
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