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  • Springer  (13)
  • American Association for the Advancement of Science  (12)
  • 1
    Electronic Resource
    Electronic Resource
    Operator algebra and the stationary states of stellar magnetic fields (1978)
    Springer
    Astrophysics and space science 55 (1978), S. 275-283 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A vector-operator algebra technique for solving magnetic field problems in a toroidal/poloidal representation is illustrated with physical examples. Among the illustrative examples are calculations of necessary and/or sufficient conditions for the existence of stationary magnetic fields in stellar interiors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00642260
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  • 2
    Electronic Resource
    Electronic Resource
    The phase variations of the solar cycle (1988)
    Springer
    Solar physics 115 (1988), S. 171-181 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It has previously been shown that the statistics of the phase fluctuation of the sunspot cycle are compatible with the assumption that the solar magnetic field is generated deep in the Sun by a frequency stable oscillator and that the observed substantial phase fluctuation in the sunspot cycle is due to variation in the time required for the magnetic field to move to the solar surface (Dicke, 1978, 1979). It was shown that the observed phase shifts are strongly correlated with the amplitude of the solar cycle. It is shown here that of two empirical models for the transport of magnetic flux to the surface, the best fit to the data is obtained with a model for which the magnetic flux is carried to the surface by convection with the convection velocity proportional to a function of the solar cycle amplitude. The best fit of this model to the data is obtained for a 12-yr transit time. The period obtained for the solar cycle is T = 22.219 ± 0.032 yr. It is shown that the great solar anomaly of 1760–1800 is most likely real and not due to poor data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146238
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  • 3
    Electronic Resource
    Electronic Resource
    Evidence for a solar distortion rotating with a period of 12.2 days (1976)
    Springer
    Solar physics 47 (1976), S. 475-515 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Most of the day-to-day fluctuation (originally believed to be error) in the Princeton solar oblateness observations is well described as the signal due to a ∼10 km distortion of the solar photosphere rotating rigidly with a period of 12.22±0.12 days (sidereal). This ‘solar-rotator’ signal is well-defined by the observations and seems clearly significant statistically. Owing to the apparent precession of the solar spin-axis on the sky, the signal is not strictly periodic and has a wave-form that evolves with time in a predictable way. The previously discussed enigmatic periodicity of the oblateness residuals, for which no non-solar sources were found, is eliminated when the solar-rotator signal is subtracted. The residual errors are then found to be normally distributed and uncorrelated. Including the solar-rotator signal in the least-square fit increases the implied static oblateness by 16% to Δr = 45.8±3.3 millisec (equatorial excess radius). Both the static oblateness signal and the solar-rotator signal might be interpreted phenomenonologically as ‘brightness’ signals due to a rigidly rotating non-uniform distribution of temperature in the upper photosphere. However, such a description encounters physical difficulties when the requirements of energy and momentum balance are considered. Including the excess static oblateness yields a distortion in the form of an ellipoid whose major axis is tilted 85° from the solar axis. Possible conflicts with other recent observations are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154759
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  • 4
    Electronic Resource
    Electronic Resource
    The enigmatic periodicity of the solar oblateness (1974)
    Springer
    Solar physics 37 (1974), S. 271-299 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The complex wave-form of the 25 2/3 day periodicity of the solar oblateness is exhibited. The statistical significance and strength of the fluctuation is examined. Using several lines of evidence the periodic fluctuation is shown to be a fluctuation in shape, not brightness. The fluctuation does not correlate with indicators of sunspots, faculae, prominences or magnetic fields. The detailed results of the analysis of the correlation with faculae are given. A possible explanation for the absence of the negative-correlated fluctuation delayed by 1/2 the period is examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00152488
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  • 5
    Electronic Resource
    Electronic Resource
    A magnetic core in the Sun? The solar rotator (1982)
    Springer
    Solar physics 78 (1982), S. 3-16 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The previously found solar distortion rotating rigidly and wave-like on the surface with a ∼ 12 day period is interpreted as the shape of the gravitational potential induced by the solar core distorted by an internal magnetic field and rotating rigidly with this period. The distortion does not have a symmetry axis and the necessary magnetic field is not compatible with the axial symmetry required of a quasi-static field locked in the rotating core. It is concluded that if the solar distortion is due to such a process the core is oscillating with a very long period, a toroidal oscillation with a period of the order of years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151138
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  • 6
    Electronic Resource
    Electronic Resource
    Gravitation and space science (1965)
    Springer
    Space science reviews 4 (1965), S. 419-460 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00177090
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  • 7
    Electronic Resource
    Electronic Resource
    On observing the absence of an atom (1986)
    Springer
    Foundations of physics 16 (1986), S. 107-113 
    Details
    ISSN: 1572-9516
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An atom is confined to a box in its ground state. An attempt is made to observe it in the left half of the box by scattering photons out of a photon wave packet passing through this half of the box. If no photons are scattered, the atom is missing. It is located on the right side of the box and its wave function is changed. The expectation value of the combined atom and photon energy is increased. For the other alternative, that the atom is found on the left side, the expectation value is decreased. By including both alternatives, it is shown that the mean energy is conserved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01889375
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  • 8
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    Republication of: The theoretical significance of experimental relativity (2019)
    Springer
    Details
    Publication Date: 2019-04-30
    Print ISSN: 0001-7701
    Electronic ISSN: 1572-9532
    Topics: Physics
    Published by Springer
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  • 9
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    Operator algebra and the stationary states of stellar magnetic fields (1978)
    Springer
    Details
    Publication Date: 1978-01-01
    Print ISSN: 0004-640X
    Electronic ISSN: 1572-946X
    Topics: Physics
    Published by Springer
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  • 10
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    The phase variations of the solar cycle (1988)
    Springer
    Details
    Publication Date: 1988-01-01
    Print ISSN: 0038-0938
    Electronic ISSN: 1573-093X
    Topics: Physics
    Published by Springer
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