A Retrospective View of Australian Solar Radio Astronomy 1945–1960

Stewart, R. T.; Wendt, Harry; Orchiston, Wayne; Slee, Bruce

doi:10.1007/978-1-4419-8161-5_22

Cited by 7 publications

(3 citation statements)

References 84 publications

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“…Through indirect techniques, indications of the presence of even much smaller structures can be found, even if explicit images are not obtained. Such 'superresolution' techniques include the use of turbulent scattering of radio waves in interstellar seeing 4 or the combination of the direct radio signal with that refracted or scattered off other cosmic structures, akin to classical sea interferometers [5][6] . Thus, an 'interstellar interferometer' may be formed, in special cases providing a spatial resolution on scales down to ∼1 µas [7][8][9] , or else aspects of small-scale source structure may be inferred from its time variability.…”

Section: Highest Angular Resolution In Astronomymentioning

confidence: 99%

Intensity interferometry: optical imaging with kilometer baselines

Dravins

2016

SPIE Proceedings

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Optical imaging with microarcsecond resolution will reveal details across and outside stellar surfaces but requires kilometer-scale interferometers, challenging to realize either on the ground or in space. Intensity interferometry, electronically connecting independent telescopes, has a noise budget that relates to the electronic time resolution, circumventing issues of atmospheric turbulence. Extents up to a few km are becoming realistic with arrays of optical air Cherenkov telescopes (primarily erected for gamma-ray studies), enabling an optical equivalent of radio interferometer arrays. Pioneered by Hanbury Brown and Twiss, digital versions of the technique have now been demonstrated, reconstructing diffraction-limited images from laboratory measurements over hundreds of optical baselines. This review outlines the method from its beginnings, describes current experiments, and sketches prospects for future observations.

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Section: Highest Angular Resolution In Astronomymentioning

confidence: 99%

Intensity interferometry: optical imaging with kilometer baselines

Dravins

2016

SPIE Proceedings

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“…By the time the Parkes Radio Telescope opened in late 1961, Radiophysics was widely regarded as one of the world's foremost radio astronomical institutions, and a number of people have opined on the range of factors that combined during the late 1940s and through the 1950s to bring about this situation (e.g., see Stewart et al, 2011;Sullivan, 2009). All would agree that having a sizeable highly-skilled radar-orientated workforce that largely stayed together after WWII was a primary ingredient, only made possible by the enlightened view of Sir David Rivett (1886-1961Fig.…”

Section: (Continued)mentioning

confidence: 99%

From Radar to Radio Astronomy

Orchiston

Robertson

Sullivan

2021

Golden Years of Australian Radio Astronomy

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Today’s astronomers study the sky at a wide range of wavelengths, spread across the electromagnetic spectrum, from radio through microwave, infrared, the optical range, the ultraviolet, X-rays and gamma rays (Fig. 1.1). They also use cosmic rays and neutrinos, and the newest field is gravitational wave astronomy. Some of these types of radiation can be observed from the Earth’s surface, others rely on space telescopes. Some are comparatively recent innovations, while optical astronomy – in various guises – dates back many millennia.

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“…3.2) would quickly gain world supremacy in solar radio astronomy, and maintain this position through until the mid-1980s when the closing of the Culgoora Radioheliograph and staff promotions and retirements saw the demise of the RP Solar Group. See Orchiston et al (2006) for the genesis of solar radio astronomy in Australia; see also Stewart et al (2011b) for an overview of Australian solar radio astronomy 1945to 1960, and Stewart et al (2011a for Paul Wild's impressive contribution to Australian Fig. 3.2 A Culgoora Radioheliograph antenna and members of the Radiophysics Solar Group during the mid-1960s.…”

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confidence: 99%

Exploring the Neighbourhood – the Sun, the Moon and Jupiter

Orchiston

Robertson

Sullivan

2021

Golden Years of Australian Radio Astronomy

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The idea that the Sun may emit radio waves has a long history. As Woody Sullivan (1982) has shown in his Classics in Radio Astronomy, the idea first gained credence in the 1890s, but initial searches by a number of different investigators proved fruitless (e.g. see Débarbat et al. (2007) for details of Nordmann’s search in 1901). Success would come half-century later, thanks largely to the development of wartime radar.

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A Retrospective View of Australian Solar Radio Astronomy 1945–1960

Cited by 7 publications

References 84 publications

Intensity interferometry: optical imaging with kilometer baselines

Intensity interferometry: optical imaging with kilometer baselines

From Radar to Radio Astronomy

Exploring the Neighbourhood – the Sun, the Moon and Jupiter

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