Bernie Fanaroff | |
---|---|
Born | Bernard Lewis Fanaroff 1947 (age 76–77) Johannesburg, South Africa |
Nationality | South African |
Alma mater | University of the Witwatersrand (BSc) University of Cambridge (PhD) |
Known for | Fanaroff–Riley classification [1] |
Spouse | Wendy Vogel |
Scientific career | |
Fields | Radio astronomy |
Institutions | Square Kilometre Array |
Thesis | Cosmological Information from Radio Source Spectra (1974) |
Bernard Lewis Fanaroff FRS (born 1947) is a South African astronomer and trade unionist. [2] [3] He served in several positions in the South African government from 1994 to 2000 related to the Reconstruction and Development Programme, the RDP, and to Safety and Security.From 2003 to 2015 he led South Africa's bid to host the Square Kilometre Array Radio Telescope, the SKA, in Africa and the design and construction of the MeerKAT radio telescope. [3] [4] He is the co-developer of the Fanaroff–Riley classification, a method of classifying radio galaxies. He was the Project Director of South Africa's Square Kilometre Array bid. [3]
Fanaroff was born in Johannesburg, South Africa, to parents of Latvian and Lithuanian Jewish origins, [5] and attended Northview High School. He completed a BSc.Hons (Physics) in 1970 at the University of the Witwatersrand (WITS) and a PhD in Radio Astronomy from the University of Cambridge in 1974. [6] [3] [7] While working on his PhD and in collaboration with British astronomer Julia Riley, he developed the Fanaroff–Riley classification of radio galaxies, based on their radio luminosity and emission morphology. [2] [7]
After completing his PhD, Fanaroff returned to South Africa and lectured in Astronomy at WITS for two years. [8] He resigned from the university at the end of 1976 to work as an organizer for the Metal and Allied Workers Union. He served as an organiser of MAWU, which later amalgamated with other unions to become the National Union of Metalworkers of South Africa and served NUMSA as a national secretary from 1987 to 1994. [9] He joined the government as a Deputy Director-General in the Office of President Nelson Mandela from 1994 to 1999. [3] [4] He served as head of the Office for the Reconstruction and Development Programme; Deputy director-general of the Department of Safety and Security (1997-2000); Chair of the integrated Justice System Board and Steering Committee for Border Control. [2] [3] [4] In May 2010 he was appointed a Non-executive director of Eskom. [3] [10]
In 2003 Fanaroff was appointed the Project Director of South Africa's Square Kilometre Array (SKA) bid, [2] [3] a position he held until his retirement in 2015, although he still continued on in an advisory capacity. [4] Early on Fanaroff realised that the Karoo region in which the SKA is to be located has a shortage of qualified teachers for mathematics and science. To overcome this problem and to supply the project with future skilled South African scientists, engineers and artisans Fanaroff and his colleagues established an artisan training centre in the Karoo and instituted a programme to bring qualified teachers to the local schools, as part of a much larger Human Capital Development programme to train students from South Africa and the rest of Africa from undergraduate to post-doctoral level. [11]
In 2020 Fanaroff was appointed the chairman of the board of directors of Karoo Biosciences, a company co-founded in 2019 by Jack Lewis and Omar Burjaqby.
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The first detection of radio waves from an astronomical object was in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and galaxies, as well as entirely new classes of objects, such as radio galaxies, quasars, pulsars, and masers. The discovery of the cosmic microwave background radiation, regarded as evidence for the Big Bang theory, was made through radio astronomy.
Karl Guthe Jansky was an American physicist and radio engineer who in April 1933 first announced his discovery of radio waves emanating from the Milky Way in the constellation Sagittarius. He is considered one of the founding figures of radio astronomy.
The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory in the southwestern United States. It lies in central New Mexico on the Plains of San Agustin, between the towns of Magdalena and Datil, approximately 50 miles (80 km) west of Socorro. The VLA comprises twenty-eight 25-meter radio telescopes deployed in a Y-shaped array and all the equipment, instrumentation, and computing power to function as an interferometer. Each of the massive telescopes is mounted on double parallel railroad tracks, so the radius and density of the array can be transformed to adjust the balance between its angular resolution and its surface brightness sensitivity. Astronomers using the VLA have made key observations of black holes and protoplanetary disks around young stars, discovered magnetic filaments and traced complex gas motions at the Milky Way's center, probed the Universe's cosmological parameters, and provided new knowledge about the physical mechanisms that produce radio emission.
The National Radio Astronomy Observatory (NRAO) is a federally funded research and development center of the United States National Science Foundation operated under cooperative agreement by Associated Universities, Inc. for the purpose of radio astronomy. NRAO designs, builds, and operates its own high-sensitivity radio telescopes for use by scientists around the world.
Grote Reber was an American pioneer of radio astronomy, which combined his interests in amateur radio and amateur astronomy. He was instrumental in investigating and extending Karl Jansky's pioneering work and conducted the first sky survey in the radio frequencies.
The Square Kilometre Array (SKA) is an intergovernmental international radio telescope project being built in Australia (low-frequency) and South Africa (mid-frequency). The combining infrastructure, the Square Kilometre Array Observatory (SKAO), and headquarters, are located at the Jodrell Bank Observatory in the United Kingdom. The SKA cores are being built in the southern hemisphere, where the view of the Milky Way galaxy is the best and radio interference is at its least.
Julia M. Riley is a British astrophysicist who developed the Fanaroff–Riley classification.
The Hartebeesthoek Radio Astronomy Observatory (HartRAO) is a radio astronomy observatory, located in a natural bowl of hills at Hartebeesthoek just south of the Magaliesberg mountain range, and about 50 km west of Johannesburg, Gauteng, South Africa. It is a National Research Facility run by South Africa's National Research Foundation. HartRAO was the only major radio astronomy observatory in Africa until the construction of the KAT-7 test bed for the future MeerKAT array in the Meerkat National Park.
The Murchison Widefield Array (MWA) is a joint project between an international consortium of organisations to construct and operate a low-frequency radio array. 'Widefield' refers to its very large field of view. Operating in the frequency range 70–300 MHz, the main scientific goals of the MWA are to detect neutral atomic Hydrogen emission from the cosmological Epoch of Reionization (EoR), to study the Sun, the heliosphere, the Earth's ionosphere, and radio transient phenomena, as well as map the extragalactic radio sky. It is located at the Murchison Radio-astronomy Observatory (MRO).
Robert Martin Adam is the director of the Square Kilometer Array (SKA) radio-telescope in South Africa. He used to be the chief-executive officer of the South African Nuclear Energy Corporation (NECSA). and Director General of the South African Department of Science and Technology. He has worked as a consultant to the governments of Namibia and Chile, and is a Fellow of the Royal Society of South Africa.
Govind Swarup was a pioneer in radio astronomy. In addition to research contributions in multiple areas of astronomy and astrophysics, he was a driving force behind the building of "ingenious, innovative and powerful observational facilities for front-line research in radio astronomy".
MeerKAT, originally the Karoo Array Telescope, is a radio telescope consisting of 64 antennas in the Meerkat National Park, in the Northern Cape of South Africa. In 2003, South Africa submitted an expression of interest to host the Square Kilometre Array (SKA) Radio Telescope in Africa, and the locally designed and built MeerKAT was incorporated into the first phase of the SKA. MeerKAT was launched in 2018.
The ASKAP radio telescope is a radio telescope array located at Inyarrimanha Ilgari Bundara, the CSIRO Murchison Radio-astronomy Observatory in the Mid West region of Western Australia, on Wajarri Country.
The Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER) is a radio interferometer funded by the National Science Foundation to detect 21 cm hydrogen (HI) fluctuations occurring when the first galaxies ionized intergalactic gas at around 500 million years after the Big Bang. PAPER is a focused experiment aimed toward making the first statistical detection of the 21 cm reionization signal. Given the stringent dynamic range requirements for detecting reionization in the face of foregrounds that are five orders of magnitude brighter, the PAPER project is taking a carefully staged engineering approach, optimizing each component in the array to mitigate, at the outset, any potentially debilitating problems in subsequent data calibration and analysis. This staged approach addresses the observational challenges that arise from very-wide-field, high-dynamic-range imaging over wide bandwidths in the presence of transient terrestrial interference. PAPER began as a collaboration between Don Backer of the UC Berkeley Radio Astronomy Laboratory and Richard Bradley of the National Radio Astronomy Observatory. With Backer's passing in 2010, Aaron Parsons has assumed leadership of PAPER on the side of UC Berkeley.
KAT-7 is a radio telescope situated in the Meerkat National Park, in the Northern Cape of South Africa. Developed as the precursor engineering test bed to the larger MeerKAT telescope, previously known as Karoo Array Telescope (KAT), it has become a science instrument in its own right. The construction was completed in 2011 and commissioning in 2012. It also served as a technology demonstrator for South Africa's bid to host the Square Kilometre Array. KAT-7 is the first Radio telescope to be built with a composite reflector and uses a stirling pump for 75 K cryogenic cooling. The telescope was built to test various system for the MeerKAT array, from the ROACH correlators designed and manufactured in Cape Town, now used by various telescopes internationally, to composite construction techniques.
The Fanaroff–Riley classification is a scheme created by B.L. Fanaroff and J.M. Riley in 1974, which is used to distinguish radio galaxies with active nuclei based on their radio luminosity or brightness of their radio emissions in relation to their hosting environment. Fanaroff and Riley noticed that the relative positions of high/low surface brightness regions in the lobes of extragalactic radio sources are correlated with their radio luminosity. Their conclusion was based on a set of 57 radio galaxies and quasars that were clearly resolved at 1.4 GHz or 5 GHz into two or more components. Fanaroff and Riley divided this sample into two classes using the ratio of the distance between the regions of highest surface brightness on opposite sides of the central galaxy or quasar to the total extent of the source up to the lowest brightness contour. Class I are sources whose luminosity decreases as the distance from the central galaxy or quasar host increase, while Class II (FR-II) sources exhibit increasing luminosity in the lobes. This distinction is important because it presents a direct link between the galaxy's luminosity and the way in which energy is transported from the central region and converted to radio emission in the outer parts.
The International Centre for Radio Astronomy Research (ICRAR) is an international "centre of excellence" in astronomical science and technology based in Perth, Western Australia, launched in August 2009 as a joint venture between Curtin University and the University of Western Australia. The ICRAR attracts researchers in radio astronomy, contributing to Australian and international scientific and technical programs for the international Square Kilometre Array (SKA) project, the world's biggest ground-based telescope array which is in its design phase and the two Australian SKA precursors, the Australian Square Kilometre Array Pathfinder (ASKAP) and the Murchison Widefield Array (MWA), both located in Murchison. The headquarters of the ICRAR is located in Crawley.
Melanie Johnston-Hollitt is an Australian astrophysicist and professor. She has worked on the design, construction, and international governance of several radio telescopes including the Low Frequency Array (LOFAR), the Murchison Widefield Array (MWA) and the upcoming Square Kilometre Array (SKA). She was the director of the Murchison Widefield Array until December 2020 and is a professor at the Curtin Institute of Radio Astronomy at Curtin University and the International Centre for Radio Astronomy Research. Since August 2020, Melanie Johnston-Hollitt is the director of the Curtin Institute for Data Science.
Anna Margaret Mahala Scaife is a Professor of Radio Astronomy at the University of Manchester and Head of the Jodrell Bank Centre for Astrophysics Interferometry Centre of Excellence. She is the co-director of Policy@Manchester. She was awarded the 2019 Royal Astronomical Society Jackson-Gwilt Medal in recognition of her contributions to astrophysical instrumentation.
Kristine Spekkens is a Canadian astronomer. She is a professor at Queen's University, and the Canadian Science Director for the Square Kilometre Array.
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