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Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

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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...
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Detection of Black Holes01:10

Detection of Black Holes

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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...
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Gravitation Between Spherically Symmetric Masses01:14

Gravitation Between Spherically Symmetric Masses

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The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
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Reduced Mass Coordinates: Isolated Two-body Problem01:12

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In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...
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Second Order systems I01:20

Second Order systems I

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A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...
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Second Order systems II01:18

Second Order systems II

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In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
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関連する実験動画

Updated: May 5, 2026

Setting Limits on Supersymmetry Using Simplified Models
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Setting Limits on Supersymmetry Using Simplified Models

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サブパーセックの超大質量バイナリブラックホールシステム候補である.

Todd A Boroson1, Tod R Lauer

  • 1National Optical Astronomy Observatory, Tucson, Arizona 85726, USA. tyb@noao.edu

Nature
|March 6, 2009
PubMed
まとめ
この要約は機械生成です。

天文学者は,SDSS J153636.22+044127.0というユニークなクエザーを発見し,それはおそらく二重の超大質量ブラックホールシステムである. この発見は,そのようなシステムが宇宙で一般的であるという理論を裏付けている.

さらに関連する動画

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
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関連する実験動画

Last Updated: May 5, 2026

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

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8.2K
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
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科学分野:

  • 天体物理学 天体物理学
  • コスモロジー・コスモロジーとは
  • 銀河の進化 銀河の進化 銀河の進化

背景:

  • 銀河の合併は,銀河の形成と成長の主要なメカニズムです.
  • ほとんどの大きな銀河は,その中心に超大質量ブラックホール (SMBH) を宿していることが知られている.
  • SMBHの普及は,銀河の合併により,バイナリSMBHシステムが一般的であるべきであることを示唆しています.

研究 の 目的:

  • 潜在的な二重超大質量ブラックホールシステムを特定し,特徴づけること.
  • バイナリーSMBH.の存在を示し得る異常なクエーサーの性質を調査する.

主な方法:

  • クワサールSDSS J153636.22+044127.0.0のスペクトル解析について
  • クワザーのスペクトル内の異なる放射と吸収ラインシステムの識別.
  • スペクトル特性の速度分離分析. スペクトル特性の速度分離分析.

主要な成果:

  • クワザールSDSS J153636.22+044127.0は,3500 km/sの速度分離を持つ2つの広線放射系を示しています.
  • 中間速度で未解決の吸収線の第三のシステムが検出されました.
  • これらのスペクトル特性は,既知のクエザールの中で唯一のものである.

結論:

  • 観測されたスペクトルの特徴は,SDSS J153636.22+044127.0が二重超大質量ブラックホールシステムであることを強く示唆しています.
  • ブラックホールの推定質量は,太陽の10^7.3と10^8.9の質量である.
  • この二進星系は,軌道周期が約100年,距離が約0.1パーセックであると予測されています.