マリナー10号による,金星と関連して加速した電子と陽子の探査
まとめ
マリナー10号は,弓の衝撃領域でも,金星近くで有意な電子や陽子の流動を検出しなかった. これらの発見は,特に金星を考慮して,粒子加速理論に挑戦しています.
科学分野:
- 宇宙物理学 宇宙物理学
- プラズマ物理学 プラズマ物理学
- 惑星科学は惑星科学である.
背景:
- 太陽風と惑星の相互作用は,宇宙物理学の研究の重要な分野である.
- 惑星の磁気圏と,電荷粒子ダイナミクスへの影響を理解することは極めて重要です.
- 金星への以前のミッションは,いくつかのデータを提供しましたが,低流量粒子の環境に関するギャップが残っています.
研究 の 目的:
- 金星のプラズマの覚醒と弓の衝撃領域におけるエネルギースペクトルと電子と陽子の流れを測定するために.
- 異常な静かな太陽条件下での低流量粒子の存在を調査するために.
- 惑星環境における粒子加速に必要な条件を評価する.
主な方法:
- マリナー10号の宇宙船でシカゴ大学の機器を使用した.
- 測定された電子エネルギースペクトルとフロー (0.1830 MeV) と陽子のエネルギースペクトルとフロー (0.568 MeV).
- プラズマの覚醒と,金星と関連した弓の衝撃領域に焦点を当てた測定.
主要な成果:
- 金星の近くでは,電子や陽子の強度やスペクトルの変化が増加した証拠は見つかりませんでした.
- 観測された弓の衝撃領域内,またはその近くで放射能の爆発は検出されなかった.
- 測定された粒子の流れは,以前のマーナー探査機による金星への探査よりも大幅に低かった.
結論:
- 検出可能なエネルギー粒子の欠如は,金星には有意な磁気圏がないことを示唆しています.
- これらのゼロ結果は,粒子加速メカニズムに関する理論に重要な制約を与える.
- グローバルな磁場がない場合の粒子ダイナミクスを完全に理解するために,さらなる調査が必要である.
関連する概念動画
Electron Configuration of Multielectron Atoms
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
Magnetic Moment of an Electron
Electrons revolving around a nucleus are analogous to a circular current carrying loop. This current produces a magnetic dipole moment proportional to the electron's orbital angular momentum. Since the orbital angular momentum is quantized in terms of the reduced Planck's constant, the dipole moment is quantized in the Bohr Magneton. The value of the Bohr magneton is 9.27 x 10-24 Am2. Electrons also have an intrinsic spin angular momentum, and the associated spin magnetic moment is...
Electron Behavior
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
Electron Behavior
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
Thomson's e/m Experiment
In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
π Electron Effects on Chemical Shift: Overview
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...


