Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Doppler Effect - II01:05

Doppler Effect - II

5.0K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
5.0K
Conservation of Angular Momentum: Application01:18

Conservation of Angular Momentum: Application

12.4K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
12.4K
Detection of Black Holes01:10

Detection 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...
2.6K
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

2.9K
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...
2.9K
Doppler Effect - I00:56

Doppler Effect - I

6.8K
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
6.8K
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

3.4K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
3.4K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Localized thermonuclear bursts from accreting magnetic white dwarfs.

Nature·2022
Same author

A WC/WO star exploding within an expanding carbon-oxygen-neon nebula.

Nature·2022
Same author

[Mental disorders in type 2 diabetes].

Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova·2021
Same author

The effect of advanced recovery room care on postoperative outcomes in moderate-risk surgical patients: a multicentre feasibility study.

Anaesthesia·2020
Same author

A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887.

Science (New York, N.Y.)·2020
Same author

Comment on the consensus report on the management of hyperglycaemia in Type 2 diabetes by the American Diabetes Association and the European Association for the Study of Diabetes.

Diabetic medicine : a journal of the British Diabetic Association·2019
Same journal

Daily briefing: 'Cyborg' cockroaches breathe underwater with printed suit.

Nature·2026
Same journal

China boosts prestigious grants for young scientists - will it ease competition?

Nature·2026
Same journal

Incoming US science academy chief vows to 'double down' on research.

Nature·2026
Same journal

Author Correction: Synthesis of enantioenriched atropisomers by biocatalytic deracemization.

Nature·2026
Same journal

Electrodeposited self-assembled molecules for perovskite photovoltaics.

Nature·2026
Same journal

Neutrino's nursery found: the 'Shadow Blaster'.

Nature·2026
関連記事をすべて見る

関連する実験動画

Updated: Mar 17, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

12.1K

ラジオパルスを発する白矮星

T R Marsh1, B T Gänsicke1, S Hümmerich2,3

  • 1Department of Physics, Gibbet Hill Road, University of Warwick, Coventry CV4 7AL, UK.

Nature
|July 28, 2016
PubMed
まとめ
この要約は機械生成です。

電磁スペクトル全体に 独特の白矮星二重星系を発見しました この磁気白矮星は

さらに関連する動画

Hyperpolarized Xenon for NMR and MRI Applications
16:20

Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

20.2K
Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

3.6K

関連する実験動画

Last Updated: Mar 17, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

12.1K
Hyperpolarized Xenon for NMR and MRI Applications
16:20

Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

20.2K
Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

3.6K

科学分野:

  • * 天文学と天体物理学
  • * コンパクトスター
  • * バイナリーシステム

背景:

  • * 白い矮星は地球サイズの 密度の高い恒星残骸です
  • * 通常は紫外線から近紫外線を放射する.
  • * バイナリーでは,質量移転がX線およびIR放射を引き起こすが,遠IR/ラジオ検出はまれである.

研究 の 目的:

  • * 白い矮星と冷たい星がX線からラジオ波長に 発射されていることを報告する
  • * AR Scorpiiシステムの異常な放射特性について説明する.

主な方法:

  • * 多波長観測 (X線からラジオ)
  • * 光の曲線とスペクトルの性質の分析
  • * 軌道と回転周期の決定

主要な成果:

  • * AR Scorpiiの発見 3.56時間周期のバイナリ系
  • * 光学周波数と無線周波数で検出された強烈で急速な脈動 (周期1.97分).
  • * ホワイト・ダウンのスピンダウン力は電磁出力を大幅に上回り,スピンパワーの優位性を示す.
  • * ブロードバンドスペクトルはシンクロトロン放射と一致し,相対性電子を必要とします.

結論:

  • * AR Scorpiiは主にスピンで動いている磁性白矮星双星である.
  • * 白い矮星の回転に起因する脈動は 主に冷たい伴星から発生します
  • * 相対性電子は,観測されたシンクロトロン放射に不可欠であり,おそらく白矮星またはM星で生成されます.