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

Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

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, and the angular frequency...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
Detection of Black Holes01:10

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...
Schwarzschild Radius and Event Horizon01:21

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...
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
¹H NMR Signal Multiplicity: Splitting Patterns01:13

¹H NMR Signal Multiplicity: Splitting Patterns

When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...

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

Retraction Note: Sub-second periodicity in a fast radio burst.

Nature·2026
Same author

Producing Fraud at the Welfare-Migration Nexus: Migrant Families and Children's Social Care.

The British journal of sociology·2026
Same author

Body Surface Gastric Mapping (BSGM): Is This the Future Standard of Care Noninvasive Test for Gastric Symptoms in Pediatrics?

Neurogastroenterology and motility·2026
Same author

Trends in Inpatient Health Care Utilization for Children with Feeding Difficulties.

The Journal of pediatrics·2026
Same author

Alcohol Misuse in Older Women: A Scoping Review of Correlates, Consequences, Treatment, and Prevention.

Alcohol research : current reviews·2026
Same author

Association between blenderized tube feeds and differential oropharynx, stomach, and stool microbiome signatures relative to conventional formula feeds in children fed via enteral tube: A cross-sectional study.

JPEN. Journal of parenteral and enteral nutrition·2026
Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026
Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026
Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026
Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026
Same journal

Retraction.

Science (New York, N.Y.)·2026
Same journal

Making time.

Science (New York, N.Y.)·2026
関連記事をすべて見る

関連する実験動画

Updated: Jun 23, 2026

Hyperpolarized Xenon for NMR and MRI Applications
16:20

Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

ラジオパルサー/X線バイナリリンク

Anne M Archibald1, Ingrid H Stairs, Scott M Ransom

  • 1Department of Physics, McGill University, 3600 Rue University, Montréal, Quebec, H3A 2T8, Canada. aarchiba@physics.mcgill.ca

Science (New York, N.Y.)
|May 23, 2009
PubMed
まとめ
この要約は機械生成です。

研究者らは,バイナリ系にある近くの無線ミリ秒パルサー (MSP) を検出した. この発見は,パルサーが最近,低質量X線バイナリ (LMXB) 段階から移行したことを示唆しており,現在の蓄積円盤の欠如によって示されています.

さらに関連する動画

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

関連する実験動画

Last Updated: Jun 23, 2026

Hyperpolarized Xenon for NMR and MRI Applications
16:20

Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

科学分野:

  • 天文学と天体物理学について
  • コンパクトなオブジェクト コンパクトなオブジェクト
  • バイナリーシステム バイナリーシステム

背景:

  • ミリ秒パルサー (MSP) は急速に回転する中性子星で,同伴星からの質量移転によって回転したと考えられています.
  • 低質量X線バイナリー (LMXB) システムは,MSPの理論上の祖先であるが,直接的な観測のリンクは依然として難解である.
  • LMXBにおけるラジオパルスに関する以前の探求は,決定的な検出が得られませんでした.

研究 の 目的:

  • 新しい無線ミリ秒パルサー (MSP) の検出を報告する.
  • 近隣のMSPシステムの進化的状態を,光学的に同定された伴侶で調査する.
  • 低質量X線バイナリー (LMXB) 段階からアクティブラジオパルサー段階への移行を調査する.

主な方法:

  • ミリ秒パルサーからの無線パルサーションの検出.
  • フォローアップの観測は,光学光度測定とスペクトロスコピーを含む.
  • 蓄積円盤の有無を特定するための光学データの分析.

主要な成果:

  • 近くの無線ミリ秒パルサー (MSP) が発見され,観測されました.
  • このシステムは,光学的に同定された伴星と円形のバイナリー軌道を示しています.
  • 光学観測は,最近,蓄積円盤が消え去ったことを示しており,質量移転の停止を示唆している.

結論:

  • 検出された無線MSPは,低質量X線バイナリ (LMXB) 段階から移行した可能性が高い.
  • 現在の蓄積円盤の欠如は,最近のLMXB段階を指している.
  • この発見は,ミリ秒パルサー形成のスピンアップモデルのための観測的証拠を提供します.