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| 2. |
- Alfvén, Hannes
(författare)
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Annihilation model of quasi-stellar objects
- 1979
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Ingår i: Astrophysics and Space Science. - : Kluwer Academic Publishers. - 0004-640X .- 1572-946X. ; 64:2, s. 401-419
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Tidskriftsartikel (refereegranskat)abstract
- The possibility that annihilation is a major source of energy in cosmic physics is discussed. Since Klein suggested that the Universe might be matter-antimatter symmetric over two decades ago, there have been a significant number of papers developing the consequences of this view. These, however, have been largely ignored in the general literature. There have also been a number of papers claiming to prove that there cannot be antimatter anywhere in the observable Universe. In the first part of this paper an assessment of the differing views is given, and it is shown that none of the arguments against antimatter is convincing. The existence of antimatter is not in conflict with any observational fact. The reason for the negative attitude towards the existence of antimatter seems to be that this view is in conflict with a number of speculative but ‘generally accepted’ theories. However, recent magnetospheric and heliospheric research, includingin situ measurements of cosmic plasmas, is now drastically changing cosmic plasma physics in a way that leads to growing scepticism about quite a few of the speculative theories.An attempt is made to develop a simple phenomenological model of QSOs based on star-antistar collisions. This model can account for such basic observational properties as the acceleration to very large (non-cosmological) velocities, the existence of broad emission lines, and at the same time narrow absorption lines with different redshifts. The absence of blueshifts is also explained. The model predicts that relatively young QSOs should be at cosmological distances whereas the old ones may very well be much closer to us than indicated by their redshift.
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| 6. |
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| 7. |
- Alfvén, Hannes, et al.
(författare)
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Cosmogonic Scenario
- 1985
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Rapport (övrigt vetenskapligt/konstnärligt)
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| 8. |
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| 9. |
- Alfvén, Hannes
(författare)
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Cosmogony as an extrapolation of magnetospheric research
- 1984
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Ingår i: Space Science Reviews. - : Kluwer Academic Publishers. - 0038-6308 .- 1572-9672. ; 39:1-2, s. 65-90
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Forskningsöversikt (refereegranskat)abstract
- A theory of the origin and evolution of the Solar System (Alfvén and Arrhenius, 1975, 1976) which considered electromagnetic forces and plasma effects is revised in the light of new information supplied by space research. In situ measurements in the magnetospheres and solar wind have changed our views of basic properties of cosmic plasmas. These results can be extrapolated both outwards in space, to interstellar clouds, and backwards in time, to the formation of the solar system. The first extrapolation leads to a revision of some cloud properties which are essential for the early phases in the formation of stars and solar nebulae. The latter extrapolation makes possible to approach the cosmogonic processes by extrapolation of (rather) well-known magnetospheric phenomena.Pioneer-Voyager observations of the Saturnian rings indicate that essential parts of their structure are ‘fossils’ from cosmogonic times. By using detailed information from these space missions, it seems possible to reconstruct certain events 4–5 billion years ago with an accuracy of a few percent. This will cause a change in our views of the evolution of the solar system.
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| 10. |
- Alfvén, Hannes
(författare)
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Cosmology : Myth or science
- 1976
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Ingår i: La Recherche (Imprimé). - : Société d'éditions Scientifiques. - 0029-5671 .- 1625-9955. ; 7:69, s. 610-616
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Tidskriftsartikel (refereegranskat)
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