Early Galactic Radio Astronomy at Kootwijk

AbstractIn February 1997 the Japanese radio astronomy satellite HALCA was launched to provide the space-borne element for the VSOP mission. HALCA provided linear baselines three-times greater than that of ground arrays, thus providing higher resolution and higher AGN brightness temperature measurements and limits. Twenty-five percent of the scientific time of the mission was devoted to the “VSOP survey” of bright, compact, extra-galactic radio sources at 5 GHz. A complete list of 294 survey targets were selected from pre-launch surveys, 91% of which were observed during the satellite's lifetime.The major goals of the VSOP Survey are statistical in nature: to determine the brightness temperature and approximate structure, to provide a source list for use with future space VLBI missions, and to compare radio properties with other data throughout the electro-magnetic spectrum. All the data collected have now been analysed and is being prepared for the final image Survey paper. In this paper we present details of the mission, and some statistics of the images and brightness temperatures.

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Galactic and Extra‐Galactic Radio Astronomy

Physics Today ◽

10.1063/1.3023268 ◽

1976 ◽

Vol 29 (1) ◽

pp. 72-73

Author(s):

G. L. Verschuur ◽

K. I. Kellermann ◽

Robert W. Hobbs

Keyword(s):

Radio Astronomy ◽

Galactic Radio

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Radio astronomy and the origin of cosmic rays

Symposium - International Astronomical Union ◽

10.1017/s0074180900051512 ◽

1959 ◽

Vol 9 ◽

pp. 589-594 ◽

Cited By ~ 2

Author(s):

V. L. Ginzburg

Keyword(s):

Cosmic Rays ◽

Radio Emission ◽

Radio Astronomy ◽

Cosmic Ray ◽

Cosmic Radio ◽

Cosmic Radio Emission ◽

Galactic Radio Emission ◽

Radio Stars ◽

Galactic Radio

A paper [1] sent to the Manchester Symposium on Radio Astronomy in 1955 described the views developed earlier [2] concerning a magnetobremsstrahlung (synchrotron) origin of nonthermal cosmic radio emission. Unfortunately, for unknown reasons, it was not included in the Symposium volume [3]. At the same time the paper by Unsöld was published [3] (see also [4]), in which the nonthermal galactic radio emission is connected with radiation of a great number of cold dwarfs (radio stars). At the same time, Unsöld criticizes the theory of cosmic-ray origin, according to which the main sources of these rays are envelopes of supernovae and, perhaps, novae [2, 5, 6, 7, 8]. Therefore, we begin with some critical remarks.

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