関連する実験動画
Updated: Jan 31, 2026
07:45
Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
11.3K
恒星が巨大なブラックホールによって破壊された後,大きな準周期的な振動
Dheeraj R Pasham1, Ronald A Remillard2, P Chris Fragile3
1Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. dheeraj@space.mit.edu.
Science (New York, N.Y.)
|January 11, 2019
まとめ
巨大なブラックホールは 恒星を粉々にし X線を放射する破片を作り出します ASASSN-14liからの安定した131秒間のX線準周期的な振動は,ブラックホールの急速な回転を示唆し,イベント地平線近くから発生します.
科学分野:
- 天体物理学
- ブラックホール物理学
- X線天文学
背景:
- 巨大なブラックホールには 強力な潮力があり 恒星を崩壊させる力があります
- ブラックホールに向かって落ちる 恒星の破片は熱化し X線を放出します
研究 の 目的:
- ASASSN-14liの潮乱で観測されたX線準周期振動 (XQPO) を分析する.
- XQPOの起源と ブラックホールの特性への影響を調査する
主な方法:
- 潮破壊イベントASASSN-14liによるX線放射の観測
- 安定した131秒のX線準周期振動の分析
- ホスト銀河のスケーリング関係を用いてブラックホールの質量の推定.
主要な成果:
- ASASSN-14liから安定した131秒間のX線準周期振動が検出されました.
- 周期性により ブラックホールの事象の地平線近くから 放射が発生していることがわかります
- この発見は,ASASSN-14liに関連するブラックホールが急速に回転していることを示しています.
結論:
- 潮の乱れは準周期的な振動を引き起こします
- これらの振動は,スピンなどのブラックホールの物理的特性について貴重な情報を提供します.
- ASASSN-14liはブラックホールのダイナミクスを理解するための ユニークなケーススタディを提供します
関連する概念動画
01:10Detection of Black Holes
2.6K
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...
2.6K
03:25The Periodic Table
112.5K
As early chemists discovered more elements, they realized that various elements could be grouped by their similar chemical behaviors. One such grouping includes lithium (Li), sodium (Na), and potassium (K). All of these elements are shiny, conduct heat and electricity well, and have similar chemical properties. A second grouping includes calcium (Ca), strontium (Sr), and barium (Ba), which also are shiny, good conductors of heat and electricity, and have chemical properties in common. However,...
112.5K
01:21Perceiving Loudness, Pitch, and Location
985
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
985
04:00Periodic Classification of the Elements
59.0K
The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
59.0K
01:30Oscillations In An LC Circuit
3.1K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
3.1K
01:06Forced Oscillations
8.0K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
8.0K