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  • 1
    Electronic Resource
    Electronic Resource
    Radio Observations of OH in the Interstellar Medium (1963)
    [s.l.] : Nature Publishing Group
    Nature 200 (1963), S. 829-831 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN this article we wish to report the detection of 18-cm absorption lines of the hydroxyl (OH) radical in the radio absorption spectrum of Cassiopeia A, thereby providing positive evidence for the existence of OH in the interstellar medium. The microwave transitions of OH in the ground-state, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/200829a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Observations of Circularly Polarized OH Emission and Narrow Spectral Features (1966)
    [s.l.] : Nature Publishing Group
    Nature 210 (1966), S. 188-190 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have observed anomalously excited OH emission associated with the sources TF3, Orion A, TF49, NGC 6334, and the source neai Sag A (I1* = 0 40', 611 = 0), and found emission to be strongly circularly polarized in all cases. Fig. 1. Observed spectra of the Ou-euussiou source near W3. From top ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/210188b0
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  • 3
    Electronic Resource
    Electronic Resource
    Observations of Polarized OH Emission (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 440-441 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a recent article Weaver, Williams, Dieter and Lum1 reported strong microwave emission lines in the HII regions TF3, 1^49, W51, TF75, NGC 6334 arid Orion A at a frequency of approximately 1,665 Mc/s. In some cases the lines exhibited complex spectral structure, and in all cases the emission at ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/208440a0
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  • 4
    Electronic Resource
    Electronic Resource
    Spectrum and Relative Intensities of Interstellar OH Lines (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 62-63 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The lines given in Table 1 arise from the ground levels of 16O2H, "O1!!, and the ground and excited states of 16O1H. Detection of the 16O2H lines does not appear to be very probable, because of the upper limit of 1/13,000 for the 2H/1H abundance ratio in the direction of Cassiopeia A (ref. 8), ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/204062a0
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  • 5
    Electronic Resource
    Electronic Resource
    High-resolution Microwave Spectra of H and OH Absorption Lines of Cassiopeia A (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 475-476 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Following the OH observations, we examined the - 0-8 km/sec absorption line at the H frequency with the same frequency resolutions, as we were unaware of any previous H-line observations having been made with a resolution smaller than 5 kc/s. The equipment used was the same as for the OH ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/202475a0
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  • 6
    Electronic Resource
    Electronic Resource
    Radio observations of Venus and the interpretations (1964)
    Springer
    Space science reviews 3 (1964), S. 109-135 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The radio observations of Venus are reviewed and compared with theoretical microwave spectra computed for a variety of models of the Venusian environment. The models considered are (a) a CO2-N2 atmosphere, (b) an atmosphere of dust (the aeolosphere model), and (c) a cloud model with various loss mechanisms in the cloud. The effect of polarization on the surface emissivity has been included in all the computations. It is shown how the radio observations place limits upon the acceptable models, for example, the density and size of dust particles required in the aeolosphere model. It is shown how some models place severe restrictions on radar observations at short centimeter wavelengths, thereby emphasizing the importance of such experiments. These same models show that the Mariner II observations can not be interpreted in terms of surface phenomena and provide a new interpretation for the microwave phase effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226646
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