Results 261 to 270 of about 3,790 (296)

Development of Large Bolometer Arrays for Submillimeter and Millimeter Astronomy

2008 Global Symposium on Millimeter Waves, 2008
Access to new microelectronics facilities allows the development of large bolometer arrays for astronomy. The expected sensitivity increase is the key for the next generation of cameras at the focal plane of submillimeter and millimeter telescopes. We present here the research led in France in this domain.
F Pajot, Y Atik, C Evesque
exaly   +2 more sources

Millimeter radio astronomy as a probe for convective zone of the Sun

2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES, 2010
Relatively low spatial resolution of not great millimeter radio-telescopes narrows the range of available tasks in the field of solar physics. However, there are large scale phenomena on the Sun hidden among fine details of hires images. For example, the global distribution of solar activity is apparently connected with the processes in the depths of ...
A V Antonov
exaly   +2 more sources

Coherent Detector Arrays for Millimeter and Submillimeter Astronomy [PDF]

, 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   +2 more sources

Recent Advances in Millimeter Wave Instrumentation for Radio Astronomy

1987 IEEE MTT-S International Microwave Symposium Digest, 1987
During the past few years major advances have made in instrumentation for millimeter wave radio astronomy. Antennas have been built with large apertures and high precision and the sensitivity of receivers has improved greatly. This paper summarizes the more important of these advances.
exaly   +2 more sources

Millimeter-Wavelength Radio-Astronomy Techniques

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

Atmospheric calibration for sub-millimeter radio astronomy [PDF]

, 2015
This thesis is focused on improving the calibration accuracy of sub-millimeter astronomical observations. The wavelength range covered by observational radio astronomy has been extended to sub-millimeter and far infrared with the advancement of receiver technology in recent years.
Guan, Xin
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

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

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.
openaire   +1 more source

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