ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    The Origin of Solar Activity (1977)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Astronomy and Astrophysics 15 (1977), S. 45-68 
    Details
    ISSN: 0066-4146
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.aa.15.090177.000401
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The Origin of Solar Magnetic Fields (1970)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Astronomy and Astrophysics 8 (1970), S. 1-30 
    Details
    ISSN: 0066-4146
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.aa.08.090170.000245
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Space plasma and its origin at the sun (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 2367-2373 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper provides a concise review of the large picture of space plasmas, concentrating on the heliosphere and the origin of the x-ray corona and coronal hole at the sun. It is tentatively suggested that the active x-ray corona is heated primarily by the dissipation of magnetic energy at the spontaneous tangential discontinuities (current sheets) in the confining bipolar magnetic fields of active regions. The discontinuities arise because of the continuous mapping of the footpoints of the field by the photospheric convection. The coronal holes appear to be heated by a combination of Alfvén waves, providing the high-speed streams in the solar wind, and the microflaring in the small-scale network fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859605
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The optical analogy for vector fields (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 2652-2659 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper develops the optical analogy for a general vector field F(r), noting that the projection Fs of F onto any surface locus S of ∇×F can be expressed as the gradient of a scalar, Fs=−∇φ. It follows that the field lines of Fs pass across S as if refracted by an index of refraction ||Fs||. A sufficiently localized maximum in ||Fs|| refracts the field so as to produce a gap in the field pattern in S, with the field bifurcating and passing around the sides, rather than across, the maximum. Such a disruption of the field pattern produces a discontinuity in F. The optical analogy allows the examination of certain aspects of a vector field that are not otherwise readily accessible. In particular, in the cases of a stationary Eulerian flow v of an ideal fluid and a magnetostatic field B, the vectors v and B have surface loci in common with their curls. The intrinsic discontinuities around local maxima in ||v|| and ||B|| take the form of vortex sheets and current sheets, respectively, the former playing a fundamental role in the development of hydrodynamic turbulence and the latter playing a major role in heating the x-ray coronas of stars and galaxies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859977
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    THE DYNAMO MECHANISM FOR THE GENERATION OF LARGE-SCALE MAGNETIC FIELDS (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 257 (1975), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1975.tb36085.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Solar physics Sunny side of global warming (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 399 (1999), S. 416-417 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In these times of speculation about climate change, the news that the Sun's magnetic field has doubled since 1900 — reported by Lockwood, Stamper and Wild on page 437of this issue — may not seem exciting. Neither are the implications immediately obvious. But it is a historical ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/20816
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Magnetic Discontinuities from Field Topology (1998)
    Springer
    Astrophysics and space science 264 (1998), S. 1-7 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002414428043
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    The instability of a horizontal magnetic field in an atmosphere stable against convection (1979)
    Springer
    Astrophysics and space science 62 (1979), S. 135-142 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The theoretical problem posed by the buoyant escape of a magnetic field from the interior of a stably stratified body bears directly on the question of the present existence of primordial magnetic fields in stars. This paper treats the onset of the Rayleigh-Taylor instability of the upper boundary of a uniform horizontal magnetic field in a stably stratified atmosphere. The calculations are carried out in the Boussinesq approximation and show the rapid growth of the initial infinitesimal perturbation of the boundary. This result is in contrast to the extremely slow buoyant rise of a separate flux tube in the same atmosphere. Thus for instance, at a depth of 1/3R ⊙ beneath the surface of the Sun, a field of 102 G develops ripples over a scale of 103 km in a characteristic time of 50 years, whereas the characteristic rise time of the same field in separate flux tubes with the same dimensions is 1010 years. Thus, the development of irregularities proceeds quickly, soon slowing, however, to a very slow pace when the amplitude of the irregularities becomes significant. Altogether the calculations show the complexity of the question of the existence of remnant primordial magnetic fields in stellar interiors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00643907
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    The instability of strong magnetic fields in stellar interiors (1974)
    Springer
    Astrophysics and space science 31 (1974), S. 261-266 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract There has been discussion of the possibility of resolving the solar neutrino dilemma with a sufficiently strong magnetic field (5×108 G) in the solar interior to relieve the gas pressure by some ten percent or more. We examine the time in which magnetic buoyancy will bring a strong field to the surface and find it to be less than 108 yr. We see no possibility for retaining a suitably strong magnetic field in the solar interior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00642616
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Basic properties of magnetic flux tubes and restrictions on theories of solar activity (1976)
    Springer
    Astrophysics and space science 44 (1976), S. 107-117 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that the mean longitudinal field in a magnetic flux tube is reduced, rather than enhanced, by twisting the tube to form a rope. It is shown that there is no magnetohydrostatic equilibrium when one twisted rope is wound around another. Instead there is rapid line cutting (neutral point annihilation). It is shown that the twisting increases, and the field strength decreases, along a flux tube extending upward through a stratified atmosphere. These facts are at variance with Piddington's recent suggestion that solar activity is to be understood as the result of flux tubes which are enormously concentrated by twisting, which consist of several twisted ropes wound around each other, and which came untwisted where they emerge through the photosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650476
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...