ISSN:
1572-9559
Keywords:
submillimeter astronomy
;
heterodyne radiometry
;
laser local oscillator
;
Schottky diode mixer
;
quasi-optics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Observations of the CO J=6→5 transition at 691 GHz (434 μm) in new interstellar and planetary sources have been made. The heterodyne receiver uses an optically pumped laser local oscillator and a quasi-optical Schottky diode mixer, with measured noise temperatures consistently under 4000 K (double sideband). Continued improvements in system performance and antenna coupling have made possible the mapping of 434 μm emission from W3, and the detection of CO J=5→6 absorption in the atmosphere of Venus. A detailed description of the instrumentation and recent observational data are provided.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01009661
Permalink