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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 264 (1976), S. 239-240 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Both the Ap and vorticity area index exhibit annual variations and long term trends. The annual variations and long term trends were removed from both data sets and the resultant series normalised so that the average of each index is zero. We have calculated least-squares estimates of the Fourier ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 229 (1971), S. 186-187 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In this model, the optical and X-ray radiation is produced by synchrotron radiation from electrons and positrons produced by y-ray annihilation in the strong magnetic field of the pulsar. The primary flux of charged particles, from the magnetic polar caps, is believed to be highly bunched, the ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 227 (1970), S. 465-470 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gamma rays produced by electrons accelerated in the strong magnetic fields of neutron stars annihilate to electron–positron pairs. This leads to a two-stream situation, which results in bunching and coherent radio ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 259 (1976), S. 302-304 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gnevyshev and Novikova10 refer to the work of several other groups, published in Russian and unavailable to us. Seventeen papers are referenced, all of which are said to suggest the possibility of direct effects of solar activity on living organisms. They present evidence of two types: first, the ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 285-286 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although the acoustic waves generated at the photosphere by granular convection are estimated to be of small amplitude3'4, it has been recognized that these waves may build up into shock waves, which would bring about a drastic increase in the absorption of the acoustic-wave energy. In a uniform ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 861-864 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AT the present time there is considerable interest in explosions which occur in objects of galactic dimensions. Oort1 has suggested that such an explosion has occurred in the nucleus of our own Galaxy, and there is convincing evidence of such explosions in certain galaxies2 which are strong radio ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 61-62 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] There is a more general argument for rejecting all theories which assume that the stored energy is purely magnetic, being derived from sub-photospheric fields and propagating as the Poynting flux of slowly varying force-free configurations. Such theories require specific changes in the structure of ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 1280-1283 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been suggested that the observed Solar oblateness may be caused by a gravitational quadrupole moment. The answer may not be so simple, however, because of magnetic stress and differential rotation between the radiation layer and the ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 1283-1285 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Observations of the oblateness of the Sun suggest that it may have a rapidly spinning core. An experiment to test this suggestion, by comparing the perihelion advance of a small artificial planet of high eccentricity and Mercury, is ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 58-58 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Plasma oscillations are inherently non-radiative, so that we must ascribe our observation of these oscillations to their coupling to electromagnetic waves. In a homogeneous plasma, such coupling occurs only through non-linearity of the field and dynamical equations. It has been pointed out ...
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