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

Nuclear Transmutation03:20

Nuclear Transmutation

Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed protons being...
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...
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...
Magnetic Fields01:28

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
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...
Momentum And Radiation Pressure01:20

Momentum And Radiation Pressure

An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container. Nichols...

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

Rapid spin changes around a magnetar fast radio burst.

Nature·2024
Same author

Comparison of Deep Space Navigation Using Optical Imaging, Pulsar Time-of-Arrival Tracking, and/or Radiometric Tracking.

The journal of the astronautical sciences·2022
Same author

Searching for Gravitational Waves from Cosmological Phase Transitions with the NANOGrav 12.5-Year Dataset.

Physical review letters·2022
Same author

Enhanced x-ray emission coinciding with giant radio pulses from the Crab Pulsar.

Science (New York, N.Y.)·2021
Same author

Consequences to patients, clinicians, and manufacturers when very serious adverse drug reactions are identified (1997-2019): A qualitative analysis from the Southern Network on Adverse Reactions (SONAR).

EClinicalMedicine·2021
Same author

Return of the Big Glitcher: <i>NICER</i> timing and glitches of PSR J0537-6910.

Monthly notices of the Royal Astronomical Society·2020

関連する実験動画

Updated: Jul 18, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

銀河の中心に向かって爆発する強力な無線源.

Scott D Hyman1, T Joseph W Lazio, Namir E Kassim

  • 1Department of Physics and Engineering, Sweet Briar College, Sweet Briar, Virginia 24595, USA. shyman@sbc.edu

Nature
|March 4, 2005
PubMed
まとめ

天文学者は,銀河の中心近くで,GCRT J1745-3009という新しい一時的なラジオ源を発見しました. そのユニークな爆破特性により,これまで未知だった宇宙トランジントの分類が示唆され,ダイナミックな天体イベントの洞察が提供されています.

科学分野:

  • ラジオ天文学 ラジオ天文学
  • 天体物理学 天体物理学
  • 暫定的な天文現象である.

背景:

  • 暫定的な天文学的源は,しばしば爆発的な出来事を意味し,通常はコンパクトな物体によって電力を供給されます.
  • ラジオ天文学は高時間解像度の観測を提供しているが,狭い視野によって制限されており,ダイナミックなラジオ空のサンプル採取が不十分である.
  • X線およびガンマ線帯域の広場器具は,現在のラジオ天文学の能力とは異なり,一時的な源を定期的に検出します.

研究 の 目的:

  • 新型一時的な無線源の検出を報告するには,GCRT J1745-3009.
  • この新しい源のバースト特性を特徴付け,既知の無線トランジメンタと比較する.
  • 高い明るさの温度とエネルギー密度の影響が放出メカニズムに及ぼす影響を調査する.

主な方法:

  • 銀河中心地域の適度な広場モニタリングプログラムを活用しました.
  • 0.33GHzの周波数で観測を行った.
  • 検出された爆発の時間的特徴とスペクトルの性質を分析した.

主要な成果:

  • 銀河中心の領域で,GCRT J1745-3009という一時的な無線源が検出されました.
  • 観測されたバストの特徴は,既知のすべてのクラスの無線トランジタとは異なる.

さらに関連する動画

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

関連する実験動画

Last Updated: Jul 18, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

  • 約10^16 Kの輝度温度を測定し,一貫した放射と一致する非常に高いエネルギー密度を示しました.

    • 結論:

    • GCRT J1745-3009は,これまで知られていなかった,一時的な無線源のクラスを表しています.
    • この発見は,新しい広場無線望遠鏡が新しい天文現象を明らかにする可能性を強調しています.
    • この発見は,ダイナミックな無線天空は,まだ発見されていない多くのトランジッタ類を宿している可能性があることを示唆している.