Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.9K
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.
1.9K
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

3.3K
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,...
3.3K
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
¹H NMR Signal Multiplicity: Splitting Patterns01:13

¹H NMR Signal Multiplicity: Splitting Patterns

7.5K
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...
7.5K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.5K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.5K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

1.3K
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
1.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

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

Physical review letters·2022
Same author

Universality of free fall from the orbital motion of a pulsar in a stellar triple system.

Nature·2018
Same author

Binary and Millisecond Pulsars.

Living reviews in relativity·2017
Same author

Binary and Millisecond Pulsars at the New Millennium.

Living reviews in relativity·2017
Same author

A radio pulsar/x-ray binary link.

Science (New York, N.Y.)·2009
Same author

An eccentric binary millisecond pulsar in the galactic plane.

Science (New York, N.Y.)·2008
Same journal

Primordial black holes and their gravitational-wave signatures.

Living reviews in relativity·2025
Same journal

Solvable models of quantum black holes: a review on Jackiw-Teitelboim gravity.

Living reviews in relativity·2023
Same journal

Electromagnetic counterparts to massive black-hole mergers.

Living reviews in relativity·2022
Same journal

Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA.

Living reviews in relativity·2020
Same journal

Kilonovae.

Living reviews in relativity·2019
Same journal

Erratum: Publisher Correction: Interferometer techniques for gravitational-wave detection.

Living reviews in relativity·2019
See all related articles

Related Experiment Video

Updated: Mar 7, 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

9.8K

Binary and Millisecond Pulsars.

Duncan R Lorimer1

  • 1Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL UK.

Living Reviews in Relativity
|February 10, 2017
PubMed
Summary
This summary is machine-generated.

Recent surveys have discovered over 1700 pulsars, including 80 binary and millisecond pulsars in the Galactic disk and 103 in globular clusters. Key findings include the first double pulsar system and numerous discoveries in globular clusters like Terzan 5.

More Related Videos

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

7.4K
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

12.0K

Related Experiment Videos

Last Updated: Mar 7, 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

9.8K
Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

7.4K
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

12.0K

Area of Science:

  • Astronomy and Astrophysics
  • Compact Objects
  • Radio Astronomy

Background:

  • The study reviews binary and millisecond radio pulsars.
  • Recent advancements in pulsar surveys have significantly expanded the known pulsar population.

Purpose of the Study:

  • To summarize the properties, demographics, and applications of binary and millisecond radio pulsars.
  • To highlight recent discoveries and advancements in the field.

Main Methods:

  • Review of existing astronomical survey data.
  • Analysis of pulsar properties and population statistics.
  • Cataloging of newly discovered pulsars in various Galactic environments.

Main Results:

  • The known pulsar population now exceeds 1700.
  • 80 binary and millisecond pulsars identified in the Galactic disk.
  • 103 pulsars detected in 24 Galactic globular clusters, including notable discoveries in Terzan 5.
  • Discovery of the first double pulsar system.

Conclusions:

  • Pulsar research has seen substantial growth due to recent surveys.
  • Globular clusters are rich environments for pulsar discoveries.
  • The first double pulsar system represents a significant finding.