関連する実験動画
Updated: Jul 11, 2026

11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
まとめ
星間水素とヘリウムは,SWICS機器を用いたユリセス宇宙船によって検出されました. この発見は,太陽系外部の中性原子の密度を推定するのに役立ちます.
科学分野:
- 宇宙物理学 宇宙物理学
- ヘリオフィジックス ヘリオフィジックス
- 星間媒介は,星間媒介である.
背景:
- 太陽風は,ヘリオスフィアの中性原子と相互作用する.
- 外部太陽系の組成を理解することは,ヘリオスフィアのモデルにとって極めて重要です.
研究 の 目的:
- 遠い太陽系における星間水素とヘリウムの検出と定量化.
- 中性水素とヘリウムの数密度を推定する.
主な方法:
- ソラー・ウィンド・イオン組成スペクトロメーター (SWICS) 装置をユリセス宇宙船で利用する.
- "ピックアップ"水素の独特の速度分布関数を分析する.
- 採集された陽子と単電荷ヘリウムの流れを測定する.
主要な成果:
- 4.8AUの太陽風によってイオン化された星間水素の検出.
- 独特の速度シグネチャーによる"ピックアップ"水素の識別.
- 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.015 cm^-3. 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.015 cm^-3. 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.015 cm^-3. 推定中性水素密度:0.077 +/- 0.015 cm^-3. 推定中性水素密度:0.015
- 推定の中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013 +/- 0.003cm^-3. 推定中性ヘリウム密度:0.013
結論:
- SWICS装置は,星間水素とヘリウムを成功裏に検出しました.
- 測定された密度は,ヘリオスフィアおよび恒星間介質の研究に貴重なデータを提供します.
- この研究は,太陽風と恒星間介質の相互作用に関する私たちの理解を洗練します.
関連する概念動画
Detection of Black Holes
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
UV–Vis Spectrometers
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
Atomic Emission Spectroscopy: Instrumentation
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Atomic Emission Spectroscopy: Lab
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
Types of Global Positioning System Surveys
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...

