ヴォイジャー2による磁場研究:土星での予備的な結果

N F Ness, M H Acuna, K W Behannon

Science (New York, N.Y.)

|January 29, 1982

まとめ

ボイジャー2号は土星が確認されたことを確認した.

科学分野:

惑星科学は惑星科学である.
磁気圏物理学磁気圏物理学
宇宙物理学宇宙物理学

背景:

ボイジャー1号 (1980年) は,土星の磁気圏と磁場に関する最初の洞察を提供した.
土星の磁場は主に中心の二極体で,その回転軸からわずかに傾いている.

研究の目的:

ヴォイジャー2号のデータを用いて土星の磁気圏と惑星の磁場をさらに調査する.
磁場データを分析して異常を検出し,ボイジャー1号の観測値と比較する.

主な方法:

探査機ボイジャー2による土星の磁気圏のインシット測定.
マグネトパウスの交差点と磁場強度を含む磁場データの分析.
ボイジャー2号のデータと,それ以前のボイジャー1号のデータとの比較.

主要な成果:

ボイジャー2号のデータは,ボイジャー1号が土星の磁場に関する発見を裏付けました.
北半球における大規模な磁気異常の証拠は見つかりませんでした.
磁気圏は,圧縮のインバウンドと,アウトバウンドの有意な膨張を示し,アウトバウンド通過中に観察された滑らかで安定したフィールドを示した.

結論:

土星のキロメートルの放射線変調の正確な源は,小さな二極の傾きの影響を超えて,謎のままです.
ヴォイジャー2号の包括的な磁気圏調査は,土星の磁気環境に関する我々の理解を洗練した.

さらに関連する動画

06:27

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Published on: July 2, 2018

関連する概念動画

01:19

Magnetic Field Lines

The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:

01:28

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...

01:18

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...

01:25

Magnetic Field due to Moving Charges

A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...

01:16

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.

01:15

Magnetic Vector Potential

In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...

関連する実験動画