Results 261 to 270 of about 247,048 (296)

Millimeter-Wavelength Radio-Astronomy Techniques

Annual Review of Astronomy and Astrophysics, 1973
A A Penzias
exaly   +2 more sources

Sub-Millimeter Astronomy and Astrophysics

1985
As of 1984, the submm band (ν >300 GHz) is relatively unexplored. The word “relatively” should be stressed since, evidently, a great deal of work has been done. However, much of this is of the “discovery” or “first detection” category with emphasis on the priority of a given result, and less thought as to astrophysical consequences.
T. L. Wilson, C. M. Walmsley
openaire   +1 more source

A 0.4K Bolometer Receiver for Millimeter Astronomy

1981 International Conference on Submillimeter Waves and Their Applications, 1981
Engineering tests have been made of a continuum receiver based upon a composite bolometer cooled to 0.4K on the NRAO 36-foot telescope. We will describe some salient features of the receiver design and also discuss the relative sensitivity of this receiver compared to current coherent continuum receivers.
P. Ade, J. Davis, R. Howard, I. Nolt, J. Payne, S. Predko, J. Radostitz   +6 more
openaire   +1 more source

MILLIMETER-WAVE OPTICS AND RADIO ASTRONOMY

Soviet Physics Uspekhi, 1962
Talk at the Physics Institute, Academy of Sciences U.S.S.R., at a meeting on March 12, 1962, commemorating the fiftieth anniversary of the death of P. N. Lebedev.
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Millimeter and submillimeter wave astronomy

Annual Meeting Optical Society of America, 1986
The interstellar medium consists of diffuse clouds and dense clouds containing atoms, molecules, and dust particles at temperatures ranging from 3 to several hundred kelvins. The dense cloud gas particles are mostly molecular and the species found vary from simple molecules such as H2, CO, CS, HCN, etc.
openaire   +1 more source

Application of Millimeter Wave Receivers to Astronomy

S-MTT International Microwave Symposium Digest, 1974
Millimeter wave receivers are discussed from the point of view of applications of line astronomy. A heterodyne bolometer system is described which has a noise temperature of 300/spl deg/K at 230 GHz. It is expected that these receivers will extend the range of radio line astronomy to about 500 GHz.
T.G. Phillips, K.B. Jefferts
openaire   +1 more source

Millimeter radio astronomy and the genesis of ALMA

2015 IEEE MTT-S International Microwave Symposium, 2015
Now nearing completion in northern Chile, the Atacama Large Millimeter/Submillimeter Array (ALMA) is a partnership between North America, Europe, East Asia, and the host country of Chile. ALMA is the first truly global radio astronomy project and arguably, the most complex ground-based astronomical instrument ever built. An imaging interferometer, ALMA
openaire   +1 more source

Contemporary Millimeter- and Submillimeter-Wave Astronomy

Radiophysics and Quantum Electronics, 2003
We discuss the scientific importance of the millimeter- and submillimeter-wave astronomy. The directions of research and the main achievements in cosmology, extragalactic astronomy, and studies of the Galaxy structure, star-formation regions, and Solar-System objects are described. Topical problems are formulated.
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ALMA and Sub-millimeter-wave Astronomy

2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006
The Atacama Large Millimeter/submillimeter Array (ALMA) will be the premier millimeter and submillimeter telescope in the world when completed in 2012. ALMA will be a transformational telescope that allows astronomers to image and study at unprecedented detail the origin of stars and planets, galaxies and biologically relevant chemistry, fundamental ...
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Coherent Detector Arrays for Millimeter and Submillimeter Astronomy

2009
Progress in many areas of astronomy requires large-area surveys and observations of extended objects. This includes the cosmic microwave background, nearby galaxies, the Milky Way, and regions of star-forming regions within our galaxy. The ability to carry out such studies is critically dependent on the development of affordable high-sensitivity focal ...
Goldsmith, Paul F., Carpenter, John M., Erickson, Neal, Fisher, Rick, Ford, John, Todd, Gaier, Groppi, Chris, Harris, Andy, Mark, Heyer, Kulesa, Craig, Lawrence, Charles, Morgan, Matt, Mundy, Lee, Narayanan, Gopal, O'Neil, Karen, Readhead, Tony, Samoska, Lorene, Schloerb, Peter, Snell, Ronald, Walker, Christopher C., Ziurys, Lucy   +20 more
openaire   +1 more source