ブラックホールの合併を,ラジオロブ形態学を通して追跡する

David Merritt¹, R D Ekers

¹Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, 08903, USA. merritt@physics.rutgers.edu

Science (New York, N.Y.)

|August 3, 2002

まとめ

銀河の合併によって,二重の超大質量ブラックホールが生成される. わずかな合併でさえ,ブラックホールのスピン方向を劇的に変化させ,ジェットフリップを引き起こし,重力波干渉計による検出を可能にします.

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
引力波天文学引力波天文学

背景:

バイナリ超大質量ブラックホールは,銀河の合併によって形成されます.
これらのシステムは最終的に合併し,重力波を放出すると予想されます.
合併中のブラックホールのスピンのダイナミクスは完全に理解されていません.

研究の目的:

超大質量ブラックホール・スピン・オリエンテーションに対する銀河融合の影響を調査するため.
これらのスピン変化の観測シグネチャーを特定するために.
検出可能なブラックホールの合併イベントの割合を推定する.

主な方法:

超大質量ブラックホールを含む小さな銀河の合併のシミュレーション.
放射源の形態論の分析,特に翼を持つまたはX型放射銀河を特定する.
推論された銀河融合率と観測された銀河融合率の比較.

主要な成果:

小規模な銀河の合併は,ブラックホールのスピン軸の方向に劇的な変化を引き起こす可能性があります.
このスピンの方向転換は,関連する相対論ジェットの方向に突然のフリップにつながります.
翼状またはX型ラジオ源は,これらのスピンフリップが発生した銀河として識別されます.

結論:

この研究は,超大質量ブラックホールの融合におけるスピンの方向転換に関する観測的証拠を提供する.
ブラックホールの凝結の推論された速度は,銀河の合併速度に匹敵する.
重力波インターフェローメーターは,毎年,このような合併イベントを約"つ検出する可能性があります.

さらに関連する動画

06:58

Real-time Tracking of DNA Fragment Separation by Smartphone

Published on: June 1, 2017

08:31

Measurement of Microtubule Dynamics by Spinning Disk Microscopy in Monopolar Mitotic Spindles

Published on: November 15, 2019

関連する概念動画

01:10

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...

01:25

Divergence and Curl of Electric Field

The divergence of a vector is a measure of how much the vector spreads out (diverges) from a point. For example, an electric field vector diverges from the positive charge and converges at the negative charge. The divergence of an electric field is derived using Gauss's law and is equal to the charge density divided by the permittivity of space. Mathematically, it is expressed as

01:16

Second Uniqueness Theorem

Consider a region consisting of several individual conductors with a definite charge density in the region between these conductors. The second uniqueness theorem states that if the total charge on each conductor and the charge density in the in-between region are known, then the electric field can be uniquely determined.
In contrast, consider that the electric field is non-unique and apply Gauss's law in divergence form in the region between the conductors and the integral form to the surface...

01:26

Divergence and Curl of Magnetic Field

The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:

01:12

Bewley Lattice Diagram

The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.

01:20

Divergence Theorem in 3D Space

In vector calculus, flux measures the total flow of a vector field through a surface. For a closed surface in three-dimensional space, this means measuring how much of the field passes outward through every point on the boundary. Directly calculating this flux can be difficult when the surface has a complicated or irregular shape. The Divergence Theorem provides a powerful alternative by relating surface flux to behavior inside the enclosed region.The Divergence Theorem states that the outward...

関連する実験動画