関連する実験動画
Updated: Jul 12, 2026

10:01
Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
Published on: September 8, 2017
重力レンズによる多くの遠いクエーサーからの光の拡大
J Stuart B Wyithe1, Abraham Loeb
1Astronomy Department, Harvard University, 60 Garden Street, Cambridge, Massachusetts 02138, USA.
Nature
|June 28, 2002
まとめ
重力レンズは,遠くにあるクワザーの観測された流れを大幅に拡大することができます. この宇宙現象は,初期のクエーザーの豊富さと輝度が天文学者によって過大評価されている可能性があることを意味します.
科学分野:
- コスモロジー・コスモロジーとは
- 天体物理学 天体物理学
- 銀河の進化 銀河の進化 銀河の進化
背景:
- 高い赤偏移 (zは6.28まで) を有する明るいクエーサーが発見され,初期の宇宙形成モデルに挑戦しています.
- これらのクワザーは,数十億の太陽質量を超える質量を持つ超大質量ブラックホール (SMBH) によって動いています.
- ビッグバン後の最初の10億年以内にこのような巨大なブラックホールの急速な形成は,重要な宇宙学的パズルです.
研究 の 目的:
- 重力レンズによる高赤位移転クエサーの観測された特性への影響を調査する.
- 推定されたクエサールの数量と明るさの密度を,zで約6.に等しいzで再評価する.
- クワザールフックスを拡大する間接銀河の役割を評価する.
主な方法:
- 観測データを分析したクエーサーは,zは約6.6に等しい.
- 視線に沿った前景の銀河による重力レンズ効果のモデリング.
- レンズによるクワザールフックスの大幅化因子を定量化.
主要な成果:
- 観測されたクエーザーの最大3分の1は,zが約6で,10倍以上のフルス増幅を経験する可能性があります.
- 干渉銀河による重力レンズ形成は,クエーサー観測に影響を与える重要な要因である.
- クワザール宿主銀河の推論された豊富さは,実質的に過大評価されています.
結論:
- 高赤道移転クエザーの観測された明るさは,重力レンズによって大幅に増幅される可能性があります.
- 初期の宇宙時代にクワザーの光度密度と宿主銀河の豊富さに関する以前の推定は,改定する必要があります.
- 遠くのクワザールや初期の銀河群を研究する際には,重力レンズを考慮する必要があります.
関連する概念動画
Schwarzschild Radius and Event Horizon
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
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...
Imaging Biological Samples with Optical Microscopy
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

