関連する実験動画
Updated: Jul 27, 2026

11:20
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
マイクロクワザールLS I +61 303からの変数非常に高エネルギーガンマ線放射
1Universität Würzburg, D-97074 Würzburg, Germany.
まとめ
マイクロクワザールLS I 61 + 303からの変数ガンマ線放射を検出し,周期的な活動を示唆しました. この発見は,相対論的ジェットと宇宙線起源の物理学の洞察を提供します.
科学分野:
- 天体物理学 天体物理学
- 高エネルギー天体物理学
- ガンマ線天文学のガンマ線天文学
背景:
- マイクロクワザールは,相対論ジェットを発射するバイナリー系で,宇宙線とジェット物理学の研究に不可欠です.
- マイクロクワザール放射の理解は,高エネルギー天体物理現象の解明に役立ちます.
研究 の 目的:
- マイクロクワザールLS I 61 + 303からの変数ガンマ線放射の検出を報告する.
- マイクロクワザールにおけるガンマ線放射の周期性と軌道変調を調査する.
主な方法:
- ガンマ線望遠鏡を用いて,100ギガ電子ボルト以上の放射を検出する.
- マイクロクワザールLS I 61 + 303の6つの軌道サイクルを分析した.
- ガンマ線放射パターンを二重星系の軌道相と相関させる.
主要な成果:
- LS I 61 + 303から100GeV以上の変数ガンマ線放射の検出.
- 特定の軌道相と一致する,ガンマ線検出における観測周期性.
- 最も強いガンマ線放射は,最も近い恒星の接近点で検出されず,軌道の調節を示しています.
結論:
- マイクロクワザールLS I 61 + 303は,定期的にガンマ線を放射しています.
- 軌道変調は観測された放射または吸収プロセスに大きく影響します.
- これらの発見は,マイクロクワザール物理学の理解と,宇宙線源としてのその役割に貢献します.
関連する概念動画
Emission Spectra
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
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...
Atomic Nuclei: Larmor Precession Frequency
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
Momentum And Radiation Pressure
An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container. Nichols...
Mass Spectrum: Interpretation
An unknown compound can be established by identifying the molecular ion peak in the mass spectrum. The molecular ion peak is often weak or absent due to the predominance of fragmentation in high-energy electron beams. In such cases, a soft-energy electron beam can be used to scan the spectrum to enhance the intensity of the molecular ion peak. Additionally, chemical ionization, field ionization, and desorption ionization spectra are used to obtain a relatively intense molecular ion peak.To...
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.

