Planetary Magnetic Fields: Achievements and Prospects
... Abstract The past decade has seen a wealth of new data, mainly from the Galilean satellites and Mars, but also new information on Mercury, the Moon and asteroids (meteorites). In parallel, there have been advances in our understanding of dynamo theory, new ideas on the scaling laws for field amplitu ...
... Abstract The past decade has seen a wealth of new data, mainly from the Galilean satellites and Mars, but also new information on Mercury, the Moon and asteroids (meteorites). In parallel, there have been advances in our understanding of dynamo theory, new ideas on the scaling laws for field amplitu ...
Planetary Magnetic Fields: Achievements and Prospects
... Abstract The past decade has seen a wealth of new data, mainly from the Galilean satellites and Mars, but also new information on Mercury, the Moon and asteroids (meteorites). In parallel, there have been advances in our understanding of dynamo theory, new ideas on the scaling laws for field amplitu ...
... Abstract The past decade has seen a wealth of new data, mainly from the Galilean satellites and Mars, but also new information on Mercury, the Moon and asteroids (meteorites). In parallel, there have been advances in our understanding of dynamo theory, new ideas on the scaling laws for field amplitu ...
chapter5 - Homework Market
... • Yellow-hot is hotter than red-hot but not as hot as white-hot. • Different parts of the sun’s surface also glow slightly different colors depending on their temperatures. ...
... • Yellow-hot is hotter than red-hot but not as hot as white-hot. • Different parts of the sun’s surface also glow slightly different colors depending on their temperatures. ...
Magnetism and Matter
... magnetite had the property of attracting small pieces of iron. The word magnetism originates from the place magnesia in Greece. This property of attraction is called magnetism. The iron ore showing this property was called a magnet. Later it was discovered by the Chinese that a long piece of magnet, ...
... magnetite had the property of attracting small pieces of iron. The word magnetism originates from the place magnesia in Greece. This property of attraction is called magnetism. The iron ore showing this property was called a magnet. Later it was discovered by the Chinese that a long piece of magnet, ...
Ch7 sec1
... placed near the north pole of a second magnet, the two magnets repel. This can be summarized by stating that “like poles repel.” In contrast, you found that when the north pole of one magnet is placed near the south pole of a second magnet, the two magnets attract. This can be summarized by stating ...
... placed near the north pole of a second magnet, the two magnets repel. This can be summarized by stating that “like poles repel.” In contrast, you found that when the north pole of one magnet is placed near the south pole of a second magnet, the two magnets attract. This can be summarized by stating ...
7-2 Summary
... • New ocean crust forms along midocean ridges. • Mid-ocean ridges are large mountain ranges that extend throughout Earth’s oceans. ...
... • New ocean crust forms along midocean ridges. • Mid-ocean ridges are large mountain ranges that extend throughout Earth’s oceans. ...
GRA VIT A TIONAL
... In the accretion phase, the in ow speed is accelerated at least to (4 0 5) 2 cs and as a result magnetic eld lines are strongly dragged and squeezed to the center (see Fig. 1c of Tomisaka 1996b). Beside these, the rotation speed is accelerated as the infall proceeds. Just after the state shown in F ...
... In the accretion phase, the in ow speed is accelerated at least to (4 0 5) 2 cs and as a result magnetic eld lines are strongly dragged and squeezed to the center (see Fig. 1c of Tomisaka 1996b). Beside these, the rotation speed is accelerated as the infall proceeds. Just after the state shown in F ...
Evolution of inflation-generated magnetic field through
... [11]. In this case the power spectrum of the magnetic field is |B(k)|2 ∝ k/a4 , where k is the coordinate wave number, and the evolution with scale factor a is as expected from flux conservation. This tiny value is a consequence of the conformal invariance of the abelian vector field lagrangian dens ...
... [11]. In this case the power spectrum of the magnetic field is |B(k)|2 ∝ k/a4 , where k is the coordinate wave number, and the evolution with scale factor a is as expected from flux conservation. This tiny value is a consequence of the conformal invariance of the abelian vector field lagrangian dens ...
MAGNETISM
... The magnetic fields of individual iron atoms are so strong that interactions among adjacent iron atoms cause large clusters of them to line up with one another. These clusters of aligned atoms are called magnetic domains. Each domain is perfectly magnetized, and is made up of billions of aligned ato ...
... The magnetic fields of individual iron atoms are so strong that interactions among adjacent iron atoms cause large clusters of them to line up with one another. These clusters of aligned atoms are called magnetic domains. Each domain is perfectly magnetized, and is made up of billions of aligned ato ...
The Solar Wind Power from Magnetic Flux
... solar minimum, the open flux is uni-polar in each coronal hole, but with opposite polarities. As dictated by the conservation of magnetic flux, the total open flux of the northern polar coronal hole, which had positive polarity in solar cycle 22, is almost exactly compensated by the oppositely direc ...
... solar minimum, the open flux is uni-polar in each coronal hole, but with opposite polarities. As dictated by the conservation of magnetic flux, the total open flux of the northern polar coronal hole, which had positive polarity in solar cycle 22, is almost exactly compensated by the oppositely direc ...
ring current - Laboratory for Atmospheric and Space Physics
... into the cusp region. There is experimental evidence for this entry, in that particles with characteristic "magnetosheath energy" (i.e., less than 1 keV) have been observed over a limited region centered around 77° magnetic latitude and noon (see following figure). Such particles on newly-merged fie ...
... into the cusp region. There is experimental evidence for this entry, in that particles with characteristic "magnetosheath energy" (i.e., less than 1 keV) have been observed over a limited region centered around 77° magnetic latitude and noon (see following figure). Such particles on newly-merged fie ...
Aurora
An aurora is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere), where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes. Different aspects of an aurora are elaborated in various sections below.