Under the hypothesis that this is a consequence of planet-star magnetic field interaction, and energy dissipation, we estimate a possible field strength increase between planets of 1 and 10 MJ of a factor ~8. Intriguingly, this is consistent with recent geodynamo scaling law predictions. The ...
stars: magnetic fieldsstars: generalEvidence of magnetic interaction between late-type stars and close-in giant planets is provided by the observations of stellar hot spots rotating synchronously with the planets and showing an enhancement of chromospheric and X-ray fluxes. We investigate star-planet ...
Intriguingly, evidence of composition gradients for Neptune have existed for some time; models assuming uniform composition are inconsistent with gravitational moments (Podolak et al. 1995). Additionally, the magnetic field structure of Neptune and Uranus has been modeled as due to composition gradients...
The field’s strength has decreased by 10 or 15 per cent so far and this has increased the debate over whether it signals a reversal of the planet’s lines of magnetic force. During a reversal, the main field weakens, almost vanishes, and reappears with opposite polarity. The transition ...
The evolving magnetic field of the planet-hosting star HD189733. HD189733 is an active K dwarf that is, with its transiting hot Jupiter, among the most studied exoplanetary systems. In this first paper of the Multiwavele... Fares,R.,Bourrier,... - 《Monthly Notices of the Royal ...
magnetic field and dense atmosphere could shield against the effect of these harmful rays. “The question is how well an atmosphere could deal with that,” saysIgnas Snellenof the University of Leiden in the Netherlands. “I think the probability that this planet has life is larg...
The ages of the basins are not known, but, by analogy with the Moon, they are likely to have formed toward the end of the so-called late heavy bombardment period in solar system formation history, around 3.8–4 Gyr ago. Thus, the magnetic field may have turned off by around 4 Gyr ...
Geometrical considerations are presented to show that dayside magnetic merging when constrained to act only where the fields are antiparallel results in li... NU Crooker - 《Journal of Geophysical Research Space Physics》 被引量: 1486发表: 1979年 Evidence for open field lines in Jupiter's magnetos...
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Models of magnetic field generation in partly stable planetary cores: Applications to Mercury and Saturn At the planet's surface, the dipole stands out and the quadrupole and the octu- pole components contribute significantly on time average. The spectral ... UR Christensen,J Wicht - 《Icarus》...