概括
相对论喷流,即高能电子流,不仅在遥远的星系中发现,而且在较小的,局部的X射线双星中也发现. 这些较小的来源可能对我们银河系中高能粒子的产生做出了重大贡献.
科学领域:
- 天体物理学 天体物理学
- 高能天体物理学 高能天体物理学
- 血物理学的等离子体物理学
背景情况:
- 相对论喷流是来自遥远无线电星系中超大质量黑洞的高能电子的结合外流.
- 这些喷气发出无线电波长的同步子辐射,以接近光速的速度传播.
- 这种喷射在较小,局部的天体物理源的起源和流行仍然是积极研究的领域.
研究的目的:
- 调查相对论喷气生产在较小,局部天体物理源的潜力.
- 探索X射线双星与高能光子源之间的关联.
- 评估这些较小的来源对银河系高能粒子和光子生产的贡献.
主要方法:
- 对观测数据的分析,包括X射线和马射线观测.
- 源属性的比较与相对论喷流的已知特征.
- 研究不同类型的天体之间的相关性.
主要成果:
- 数据表明,一个微弱的X射线双星和一个马射线源之间存在关联.
- 这一发现表明,较小的,局部的来源可以产生相对论的外流.
- 这些来源可能是银河系高能粒子和光子预算的重要贡献者.
结论:
- 相对论喷流并不仅限于遥远星系中的超大质量黑洞.
- X射线二进制系统代表了一类能够产生相对论喷气的局部源.
- 对这些系统的进一步研究对于理解我们银河系中高能现象至关重要.
相关概念视频
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01:10Detection of Black Holes
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Not until the 1960s, when the first neutron...
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01:20Atomic Emission Spectroscopy: Overview
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03:23Types of Radioactivity
The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
01:22Atomic 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.
01:24X-ray Imaging
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...