Radio-frequency Radiation from the Great Nebula in Andromeda (M.31).

  title={Radio-frequency Radiation from the Great Nebula in Andromeda (M.31).},
  author={R. Hanbury Brown and Cyril Hazard},
THE experiments of Bolton and Stanley1, and of Ryle and Smith2,3, using a radio interferometer have shown that a significant part of the extra-terrestrial radio noise is associated with point sources with diameters of less than 6 minutes of arc. Although the majority of these sources are unidentified with visual objects, their distribution indicates that they lie in our own galaxy. Attempts to detect radio emissions from specific extra-galactic objects have hitherto been unsuccessful. In this… 

Radio-Frequency Radiation from the Spiral Nebula Messier 81

FOLLOWING the detection1 of radio-frequency radiation from the Great Nebula in Andromeda M.31, the 218-ft. paraboloid at the Jodrell Bank Experimental Station has been used for continuing the

Radio-Frequency Radiation from Tycho Brahe's Supernova (A.D. 1572)

SINCE the discovery of localized sources of extraterrestrial radio-frequency radiation in 19481, surveys have been carried out over the whole sky2,3, and the positions and intensities of about one

XIII. Extra-galactic radio-frequency radiation

Summary It has been shown previously that radio-frequency radiation is being received on the earth from the extra-galactic nebula N.G.C. 224 (M. 31). This paper reports some initial attempts to

On the Discovery of Extragalactic Radio Sources

The first measurements of the cosmic radio emission by Jansky! and Reber" showed that there was a reasonably close similarity between the intensity contours and the overall galactic structure. The

Radio-Astronomy and Navigation

  • C. M. Cade
  • Physics
    The Journal of the Royal Aeronautical Society
  • 1958
The difficulties of determining latitude and longitude under adverse weather conditions, when neither the Sun nor stars can be sighted, are well-known, and the advantages of a non-visual system of

The Contribution of the Division of Radiophysics Potts Hill Field Station to International Radio Astronomy

During the 1950s Australia was one of the world’s foremost astronomical nations owing primarily to the work of the dynamic Radio Astronomy Group within the Commonwealth Scientific and Industrial

Extragalactic radio continuum surveys and the transformation of radio astronomy

This Review traces the evolution of extragalactic radio continuum surveys from the earliest days of radio astronomy to the present, and identifies the challenges that must be overcome to achieve this transformational change.

Planck intermediate results: XXV. The Andromeda galaxy as seen by Planck

The Andromeda galaxy (M 31) is one of a few galaxies that has sufficient angular size on the sky to be resolved by the Planck satellite. Planck has detected M 31 in all of its frequency bands, and

1962 Guthrie Lecture: The Physical Basis of the Research Programmes at Jodrell Bank

This paper, which is the written version of the 1962 Guthrie Lecture, describes the physics underlying the radio astronomical researches at Jodrell Bank. The following topics are covered: (i) the

The Narrabri Stellar Intensity Interferometer: a 50th birthday tribute

  • P. Tuthill
  • Physics
    Astronomical Telescopes and Instrumentation
  • 2014
This year marks the 50th anniversary since the first scientific measurements were produced with the Narrabri Stellar Intensity Interferometer, which was constructed in the early 1960’s by Robert



A New Intense Source of Radio-Frequency Radiation in the Constellation of Cassiopeia

THE discovery by Hey, Parsons and Phillips1,2 of a variable source of radio-frequency radiation in the constellation of Cygnus suggested that at least part of the galactic radiation was due to very

Variable Source of Radio Frequency Radiation in the Constellation of Cygnus

COSMIC or galactic noise was discovered by Jansky1 in 1931; but its exact origin has remained uncertain. It is generally supposed to originate from collisions in interstellar matter2; but there are

An investigation of radio-frequency radiation from the sun

  • M. RyleD. Vonberg
  • Physics
    Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1948
A special type of aerial has been devised which enables the solar radiation to be recorded separately from the galactic radiation, and so enables continuous observation of the sun to be made with aerials of comparatively low directivity.