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Formation | 1946 |
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Purpose | To manage research facilities for the benefit of the international scientific community and the public. |
Headquarters | Washington, D.C., United States |
Official language | English |
President | Adam Cohen |
Website | www.aui.edu |
Associated Universities, Inc. (AUI) is a research management corporation that builds and operates facilities for the research community. AUI is a not-for-profit 501(c)(3) corporation, headquartered in Washington, DC. The President is Dr. Adam Cohen. AUI's major current operating unit is the National Radio Astronomy Observatory (NRAO), which it operates under a Cooperative Agreement with the National Science Foundation.
AUI was established in 1946 as an educational institution dedicated to research, development, and education in the physical, biological and engineering sciences. Nine northeastern universities joined in sponsoring AUI in 1946: Columbia University, Cornell University, Harvard University, Johns Hopkins University, Massachusetts Institute of Technology, University of Pennsylvania, Princeton University, University of Rochester, and Yale University.
AUI was granted an absolute charter by the Board of Regents of the State University of New York Education Department, which called for AUI to "acquire, plan, construct and operate laboratories and other facilities" that would unite the resources of universities, other research organizations and the Federal Government. It was envisioned that AUI would create facilities and laboratories so large, complex, and costly as to be outside the scope of a single university. These facilities were to be made available on a competitive basis to all qualified scientists without regard to affiliation, as well as to resident scientific staff.
Over the years, AUI took on a broad national character with a diversified Board of Trustees from universities and other institutions across the country. The nine founding universities are still represented, although ties to their administrations are not of a formal nature.
From 1947 until 1998, AUI was responsible for building and then managing the Department of Energy's Brookhaven National Laboratory (BNL), a multi-disciplinary science research center located on Long Island, New York. In that period, AUI/BNL were responsible for the design, development, construction, and operation of numerous major facilities, the most recent being the National Synchrotron Light Source and the Relativistic Heavy Ion Collider. During AUI's management at Brookhaven, six Nobel prizes were awarded for research conducted wholly or partially at BNL. Four of those prizes were awarded to scientists at the laboratory, in 1957, 1976, 1980 and 1988. AUI lost the contract to manage the BNL in 1998 in the wake of a 1994 fire at the facility's high-beam flux reactor that exposed several workers to radiation and reports in 1997 of a leak of tritium into the groundwater of the Long Island Central Pine Barrens, on which the facility sits. [1] [2]
In 1955, AUI proposed the establishment of a national radio observatory and has managed the National Radio Astronomy Observatory (NRAO) for NSF since its creation in 1956.
In 2002, AUI was named by NSF as the North American Executive for the international Atacama Large Millimeter/submillimeter Array (ALMA).
In 2008, AUI, together with the Association of Universities for Research in Astronomy (AURA), created the Virtual Astronomical Observatory LLC, to manage the Virtual Astronomical Observatory for NSF and NASA.
In 2015, AUI, the National Science Foundation (NSF) selected Associated Universities, Inc. (AUI) to manage the National Radio Astronomy Observatory (NRAO) through a new 10-year cooperative agreement. The new agreement includes the operation of the Karl G. Jansky Very Large Array (VLA), the North American share of the international Atacama Large Millimeter/submillimeter Array (ALMA), and NRAO's development laboratories and administrative and management functions, effective 1 October 2016.
The Green Bank Telescope (GBT) and Very Long Baseline Array (VLBA), which were recommended for divestment several years ago, will exit NRAO and become independent facilities known as the Green Bank Observatory (GBO), with Karen O'Neill as its director, and the Long Baseline Observatory (LBO), with Walter Brisken as its director. Pending submission, review, and approval of a supplemental funding request, AUI will continue managing each under a separate cooperative agreement for the next two years, while NSF decides the long-term future of these facilities. [3]
The National Radio Astronomy Observatory (NRAO), headquartered in Charlottesville, Virginia, is a Federally Funded Research and Development Center (FFRDC) operated by Associated Universities, Inc. under cooperative agreement with the United States National Science Foundation. NRAO designs, builds, and operates high sensitivity radio telescopes for use by scientists around the world.
NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media. NRAO's facilities are discussed below.
The Atacama Large Millimeter/submillimeter Array (ALMA), the world's most advanced millimeter/submillimeter observatory, is located on the Chajnantor plateau of the Chilean Andes near San Pedro de Atacama, 5000 m above sea level. ALMA was built by an international partnership comprising North America, Europe and East Asia, in cooperation with the Republic of Chile. AUI is the North American Executive for ALMA.
ALMA is an international astronomy facility, a single research instrument composed of 66 high-precision antennas which will enable transformational research into the physics of the cold Universe, regions that are optically dark but shine brightly in the millimeter portion of the electromagnetic spectrum. Providing astronomers with a new window on celestial origins, ALMA will probe the first stars and galaxies and directly image the formation of planets.
ALMA is funded in East Asia by the National Institutes of Natural Sciences (NINS) of Japan in cooperation with the Academia Sinica (AS) in Taiwan, in Europe by the European Organisation for Astronomical Research in the Southern Hemisphere (ESO) and in North America by the U.S. National Science Foundation (NSF) in cooperation with the National Research Council of Canada (NRC) and the National Science Council of Taiwan (NSC). ALMA construction and operations are led on behalf of East Asia by the National Astronomical Observatory of Japan (NAOJ), on behalf of Europe by ESO and on behalf of North America by the National Radio Astronomy Observatory (NRAO), which is managed by Associated Universities, Inc. (AUI).
The Very Large Array (VLA), an array of 27 25-meter antennas, is located on the Plains of San Agustin about 50 miles west of Socorro, New Mexico. Dedicated in 1980, it is an exceedingly powerful scientific instrument that has transformed many areas of astronomy, and has been used by more astronomers and has produced more scientific papers than any other radio telescope in the world. Even after more than a quarter of a century, the VLA exceeds all other radio astronomy facilities with its combination of sensitivity, flexibility, speed, and overall imaging quality. The VLA is currently being rebuilt as a new observatory, the Expanded Very Large Array (EVLA). The EVLA will provide a radio telescope of unprecedented sensitivity, resolution, and imaging capability, by modernizing and extending the existing Very Large Array. When completed, the EVLA will have sensitivity improvements of an order of magnitude, with frequency between 1.0 and 50 GHz, with up to 8 GHz bandwidth per polarization. The modifications are well over 50% complete, and early science with the VLA is expected in 2010.
The mission of the CDL, headquartered in Charlottesville, Virginia, is to support the evolution of NRAO's existing facilities and provide the technology and expertise needed to build the next generation of radio astronomy instruments. This is accomplished through development of the enabling technologies: low noise amplifiers, millimeter and sub-millimeter detectors, optics and electromagnetic components including feeds and phased arrays, digital signal processing, and new receiver architectures. CDL staff have developed and produced these critical components and subsystems not only for NRAO's telescopes, but also for the worldwide astronomical community for ground and space-based instruments. Technical innovations developed or enhanced at the CDL have contributed to improvements in communications antennas, transistors, cryogenic coolers, medical and scientific imaging, time and frequency standards, atomic clocks, GPS navigation, 911 emergency call location, and precision spacecraft navigation. NRAO technology increases our understanding of the Universe and contributes to American competitiveness.
North American ALMA Science Center in Charlottesville, Virginia, is the ALMA headquarters for North America. The NAASC supports ALMA science operations in Chile and provides user support for the North American community, including user website and proposal guides, proposal preparation, post-observation user support, data reduction "cookbooks," and organization of ALMA meetings/workshops.
The Robert C. Byrd Green Bank Telescope is the world's largest fully steerable radio telescope. The 100-meter Green Bank Telescope (GBT) is located at the Green Bank Observatory in Green Bank, West Virginia, which is inside the National Radio Quiet Zone (NRQZ).
The Very Long Baseline Array (VLBA) is a continent-wide radio telescope system offering the greatest resolving power of any astronomical instrument operational today. It is a system of ten identical 25-meter radio-telescope antennas, spread from St. Croix in the U.S. Virgin Islands, across the continental United States, to Mauna Kea, Hawaii, working together as a single instrument.
AUI is helping a university-based team that is building a 6-meter, very wide field of view submillimeter telescope, taking advantage of a superb site adjacent to ALMA, at 5600 meters above sea level in the Atacama Desert in northern Chile. AUI strongly endorses the science potential of this telescope, currently named CCAT Prime (CCAT-p). AUI obtained the land concession for the site, helped develop the initial road design, and is helping the university group establish its own legal presence in Chile. The goal continues to be the creation of a next-generation submillimeter telescope combining high sensitivity, a wide field of view, and a broad wavelength range to provide an unprecedented capability for deep, large area multicolor submillimeter surveys.
The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory located in central New Mexico on the Plains of San Agustin, between the towns of Magdalena and Datil, ~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.
The Robert C. Byrd Green Bank Telescope (GBT) in Green Bank, West Virginia, US is the world's largest fully steerable radio telescope, surpassing the Effelsberg 100-m Radio Telescope in Germany. The Green Bank site was part of the National Radio Astronomy Observatory (NRAO) until September 30, 2016. Since October 1, 2016, the telescope has been operated by the independent Green Bank Observatory. The telescope's name honors the late Senator Robert C. Byrd who represented West Virginia and who pushed the funding of the telescope through Congress.
The Very Long Baseline Array (VLBA) is a system of ten radio telescopes which are operated remotely from their Array Operations Center located in Socorro, New Mexico, as a part of the National Radio Astronomy Observatory (NRAO). These ten radio antennas work together as an array that forms the longest system in the world that uses very long baseline interferometry. The longest baseline available in this interferometer is about 8,611 kilometers (5,351 mi).
The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of 66 radio telescopes in the Atacama Desert of northern Chile, which observe electromagnetic radiation at millimeter and submillimeter wavelengths. The array has been constructed on the 5,000 m (16,000 ft) elevation Chajnantor plateau - near the Llano de Chajnantor Observatory and the Atacama Pathfinder Experiment. This location was chosen for its high elevation and low humidity, factors which are crucial to reduce noise and decrease signal attenuation due to Earth's atmosphere. ALMA is expected to provide insight on star birth during the early Stelliferous era and detailed imaging of local star and planet formation.
The National Astronomical Observatory of Japan (NAOJ) is an astronomical research organisation comprising several facilities in Japan, as well as an observatory in Hawaii and Chile. It was established in 1988 as an amalgamation of three existing research organizations - the Tokyo Astronomical Observatory of the University of Tokyo, International Latitude Observatory of Mizusawa, and a part of Research Institute of Atmospherics of Nagoya University.
The Combined Array for Research in Millimeter-wave Astronomy (CARMA) was an astronomical instrument comprising 23 radio telescopes, dedicated in 2006. These telescopes formed an astronomical interferometer where all the signals are combined in a purpose-built computer to produce high-resolution astronomical images. The telescopes ceased operation in April 2015 and were relocated to the Owens Valley Radio Observatory for storage.
Submillimetre astronomy or submillimeter astronomy is the branch of observational astronomy that is conducted at submillimetre wavelengths of the electromagnetic spectrum. Astronomers place the submillimetre waveband between the far-infrared and microwave wavebands, typically taken to be between a few hundred micrometres and a millimetre. It is still common in submillimetre astronomy to quote wavelengths in 'microns', the old name for micrometre.
The Atacama Cosmology Telescope (ACT) is a six-meter diameter telescope located on Cerro Toco in the Atacama Desert in the north of Chile, near the Llano de Chajnantor Observatory. ACT makes high-sensitivity, high-resolution, microwave-wavelength surveys of the sky in order to study the cosmic microwave background radiation (CMB), the relic radiation left by the Big Bang process. At an altitude of 5,190 metres (17,030 ft), it is one of the highest permanent, ground-based telescopes in the world.
Llano de Chajnantor Observatory is the name for a group of astronomical observatories located at an altitude of over 4,800 m (15,700 ft) in the Atacama Desert of northern Chile. The site is in the Antofagasta Region approximately 50 kilometres (31 mi) east of the town of San Pedro de Atacama. The exceptionally arid climate of the area is inhospitable to humans, but creates an excellent location for millimeter, submillimeter, and mid-infrared astronomy. This is because water vapour absorbs and attenuates submillimetre radiation. Llano de Chajnantor is home to the largest and most expensive astronomical telescope project in the world, the Atacama Large Millimeter Array (ALMA). Llano de Chajnantor and the surrounding area has been designated as the Chajnantor Science Reserve by the government of Chile.
The Atacama Submillimeter Telescope Experiment (ASTE) is a 10-meter-diameter antenna built by Mitsubishi Electric as a preprototype for ALMA.
An astronomical interferometer or telescope array is a set of separate telescopes, mirror segments, or radio telescope antennas that work together as a single telescope to provide higher resolution images of astronomical objects such as stars, nebulas and galaxies by means of interferometry. The advantage of this technique is that it can theoretically produce images with the angular resolution of a huge telescope with an aperture equal to the separation between the component telescopes. The main drawback is that it does not collect as much light as the complete instrument's mirror. Thus it is mainly useful for fine resolution of more luminous astronomical objects, such as close binary stars. Another drawback is that the maximum angular size of a detectable emission source is limited by the minimum gap between detectors in the collector array.
Astronomical Image Processing System++ is a software package whose development was started in the early nineties, written almost entirely in C++, and which initial goal was to replace the by then already aging AIPS software. It has now been reborn as CASA and is the basis of the image processing systems for several next-generation radio telescopes including ALMA, eVLA, and ASKAP.
The Astronomy and Astrophysics Decadal Survey is a review of astronomy and astrophysics literature produced approximately every ten years by the National Research Council of the National Academy of Sciences in the United States. The report surveys the current state of the field, identifies research priorities, and makes recommendations for the coming decade. The decadal survey represents the recommendations of the research community to governmental agencies on how to prioritize scientific funding within astronomy and astrophysics. The editing committee is informed by topical panels and subcommittees, dedicated conferences, and direct community input in the form of white papers summarizing the state of the art in each subdiscipline. The most recent report, Astro2020, was released in 2021.
The Cerro Chajnantor Atacama Telescope (CCAT) is a proposed 25 metres (82 ft) diameter telescope that is intended to reveal the cosmic origins of stars, planets, and galaxies with its submillimeter cameras and spectrometers enabled by superconducting detector arrays. The telescope was originally called the Cornell Caltech Atacama Telescope, but due to lack of funding the 25 metre telescope is currently on hold.
Splatalogue is a database for astronomical spectroscopy which contains information on nearly six million spectral lines and is maintained by the National Radio Astronomy Observatory (NRAO). The name is a portmanteau of "spectral line catalogue".
The Large Latin American Millimeter Array (LLAMA) is a single-dish 12 m Nasmyth optics antenna which is under construction in the Puna de Atacama desert in the Province of Salta, Argentina. The primary mirror accuracy will allow observation from 40 GHz up to 900 GHz. It is also planned to install a bolometer camera at millimeter wavelengths. After installation it will be able to join other similar instruments to perform Very Large Base Line Interferometry or to work in standalone mode. Financial support is provided by the Argentinian and Brazilian governments. The total cost of construction, around US$20 million, and operation as well as the telescope time use will be shared equally by the two countries. Construction planning started in July 2014 after the formal signature of an agreement between the main institutions involved.
Mattheus Wilhelmus Maria (Thijs) de Graauw is a Dutch astronomer.
Christine D. Wilson is a Canadian-American physicist and astronomer, currently a University Distinguished Professor at McMaster University.
Violette Impellizzeri, is an Italian astronomer, astrophysicist and university teacher.