A millisecond pulsar (MSP) is a pulsar with a rotational period less than about 10 milliseconds. Millisecond pulsars have been detected in radio, X-ray, and gamma ray portions of the electromagnetic spectrum. The leading theory for the origin of millisecond pulsars is that they are old, rapidly rotating neutron stars that have been spun up or "recycled" through accretion of matter from a companion star in a close binary system. For this reason, millisecond pulsars are sometimes called recycled pulsars. Millisecond pulsars are thought to be related to low-mass X-ray binary systems. It is thought that the X-rays in these systems are emitted by the accretion disk of a neutron star produced by the outer layers of a companion star that has overflowed its Roche lobe. The transfer of angular momentum from this accretion event can theoretically increase the rotation rate of the pulsar to hundreds of times per second, as is observed in millisecond pulsars. There has been recent evidence that the standard evolutionary model fails to explain the evolution of all millisecond pulsars, especially young millisecond pulsars with relatively high magnetic fields, e.g. PSR B1937+21. and (UCSC) showed that different millisecond pulsars must form by at least two distinct processes. But the nature of the other process remains a mystery. Many millisecond pulsars are found in globular clusters. This is consistent with the spin-up theory of their formation, as the extremely high stellar density of these clusters implies a much higher likelihood of a pulsar having (or capturing) a giant companion star. Currently there are approximately 130 millisecond pulsars known in globular clusters. The globular cluster Terzan 5 contains 37 of these, followed by 47 Tucanae with 22 and M28 and M15 with 8 pulsars each. Millisecond pulsars, which can be timed with high precision, have a stability comparable to atomic-clock-based time standards when averaged over decades. This also makes them very sensitive probes of their environments. For example, anything placed in orbit around them causes periodic Doppler shifts in their pulses' arrival times on Earth, which can then be analyzed to reveal the presence of the companion and, with enough data, provide precise measurements of the orbit and the object's mass. The technique is so sensitive that even objects as small as asteroids can be detected if they happen to orbit a millisecond pulsar. The first confirmed exoplanets, discovered several years before the first detections of exoplanets around "normal" solar-like stars, were found in orbit around a millisecond pulsar, PSR B1257+12. These planets remained, for many years, the only Earth-mass objects known outside of the Solar System. One of them, PSR B1257+12 D, has an even smaller mass, comparable to that of the Moon, and is still today the smallest-mass object known beyond the Solar System. (Wikipedia).
Extraordinary Physics with Millisecond Pulsars - Scott Ransom
Joint IAS/PU Astrophysics Colloquium: November 22, 2016 Speaker: Scott Ransom (NRAO) Title: Extraordinary Physics with Millisecond Pulsars Abstract: Pulsars are some of physics and astrophysics' most exotic objects, and they have already earned two Nobel Prizes. We currently know of abou
From playlist Natural Sciences
Astronomy - Ch. 22: Neutron Star (11 of 17) What is a Pulsar?
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn a pulsar is a neutron star oriented in such a way that the rotating beam of radio radiation passes through the direct l
From playlist THE "WHAT IS" PLAYLIST
Physics 11 Rotational Motion (5 of 6) Pulsar
Visit http://ilectureonline.com for more math and science lectures! In this video I will calculate the force required to keep a person on the surface of a pulsar at the center of the Crab Nebular (Do Not Attempt).
From playlist PHYSICS 11 ROTATIONAL MOTION
Astronomy - Ch. 22: Neutron Star (13 of 17) The Magnetic Field of a Neutron Star
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn and about the magnetic field of a pulsar and compare it to the magnetic field of Earth. Next video in this series can
From playlist ASTRONOMY 22 NEUTRON STARS & PULSARS
This question comes from William. He writes "Hi Fraser, I was wondering if you could do a video on pulsars like you did on quasars." You got it. Stars are held in perfect balance between the pressure of gravity pulling them inward, and the outward force of radiation. Once stars runs
From playlist Supernovae
Teach Astronomy - Pulsation Period
http://www.teachastronomy.com/ Just like a bell or any mechanical object, stars have a particular frequency or timescale when they tend to vibrate in response to an external disturbance. If the time that it takes for energy to dam up in the atmosphere of a giant star corresponds to the na
From playlist 15. Stars 2
A physical pendulum finds stability in its inverted position when driven at the proper frequency and amplitude combination. The physical pendulum seen here is mounted on a ball-bearing pivot and can rotate 360 degrees; the pivot is driven at about 50 Hz with an amplitude of about 1 cm (3/
From playlist Oscillations and Waves
Physics - Mechanics: Moment of Inertia (1 of 7) Parallel Axis Theorem: Example 1
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the moment of inertia of 2 spheres connected by a rod rotated about the center of the rod. Next video in the moment of inertia series: http://youtu.be/swi7U6Q9pF0
From playlist PHYSICS 12 MOMENT OF INERTIA
Millisecond Pulsars (Lecture -12) by Professor G Srinivasan
Summer course 2018 - A Random walk in astro-physics Lecture - 12 : Millisecond Pulsars by Professor G Srinivasan, Raman Research Institute (Retired) 10.00 to 12.00 Friday, 18 May 2018 Madhava Lecture Hall, ICTS Bangalore The range of densities, temperatures, magnetic fields, etc. that o
From playlist Summer Course 2018: A Random Walk In Astro-physics
Neutron Stars and Black Holes (Lecture 11: Millisecond Pulsars) by G. Srinivasan
SUMMER COURSES NEUTRON STARS AND BLACK HOLES SPEAKER: G Srinivasan (Raman Research Institute - Retired) DATE: 15 May 2019 to 28 June 2019 VENUE: Emmy Noether Seminar Room, ICTS Bangalore The theme of the course will be neutron stars and black holes, with emphasis on neutron stars i
From playlist Summer Course 2019: Neutron Stars and Black Holes
From NASA Astrophysics. Hidden deep within a group of ancient stars, there lurks a young and powerful enigma. This is NGC 6624, a globular cluster near our galaxy's center thought to be about 10 billion years old. NASA's Fermi Gamma-ray Space Telescope detects high-energy radiation from ma
From playlist Violent Universe
M28 - Millisecond Pulsar - Deep Sky Videos
Professor Paul Crowther's discussion of Messier 28 (NGC 6626) veers into discussion of millisecond pulsars and magnetars. More Messier Object videos: http://bit.ly/MessierObjects Prof Crowther is based at the University of Sheffield. Objectivity: https://www.youtube.com/c/objectivityvid
From playlist Messier Objects
Neutron Stars - Victoria Kaspi
General Relativity at 100: Institute for Advanced Study and Princeton University Celebrate the Enduring Reach, Power and Mysteries of Einstein’s Theory Victoria Kaspi - November 5, 2015 https://www.ias.edu/gr100 Albert Einstein’s general theory of relativity, a pillar of modern physics
From playlist General Relativity at 100
Pulsar Timing Arrays See Red: The Era of Low-Frequency Gravitational Wave... by Maura McLaughlin
COLLOQUIUM : PULSAR TIMING ARRAYS SEE RED: THE ERA OF LOW-FREQUENCY GRAVITATIONAL WAVE DETECTION SPEAKER : Maura McLaughlin (West Virginia University, USA ) DATE : Mon, 30 January 2023, VENUE : Online and Madhava Lecture Hall ABSTRACT Millisecond pulsars are rapidly rotating neutron s
From playlist ICTS Colloquia
Spinning Up a Neutron Star (Lecture - 03) by G srinivasan
Summer School on Gravitational-Wave Astronomy DATE: 17 July 2017 to 28 July 2017 VENUE: Madhava Lecture Hall, ICTS Bangalore This school is a part of the annual ICTS summer schools in gravitational wave astronomy. This year’s school will focus on the physics and astrophysics of compact
From playlist Summer School on Gravitational-Wave Astronomy - 2017
What Is The Centripetal Acceleration Of An Object In Circular Motion?!? #Mechanics #Engineering #Physics #Rotational #NicholasGKK #Shorts
From playlist General Mechanics
Unknown to the general populace, young men and women from around the globe are being raised in a secret, underground facility. Using a library of alien knowledge that was uncovered early in the 21st century—code name: The Quantum Guide—these future astronauts prepare for the day when they
From playlist Violent Universe
Extremely Rare Stellar Object Pulsating at 528 Hz Found In The Milky Way
Good telescope that I've used to learn the basics: https://amzn.to/35r1jAk Get a Wonderful Person shirt: https://teespring.com/stores/whatdamath Alternatively, PayPal donations can be sent here: http://paypal.me/whatdamath Hello and welcome! My name is Anton and in this video, we will tal
From playlist Neutron Stars
Introduction to Centripetal Acceleration - Period, Frequency, & Linear Speed - Physics Problems
This physics video tutorial explains the concept of centripetal acceleration and provides a basic introduction into how it works and how to solve physics problems relating to it. Centripetal acceleration is present whenever an object moves at constant speed in a circle - this is known as
From playlist New Physics Video Playlist
Sarah Vigeland - Supermassive Black Holes and Merging Galaxies - IPAM at UCLA
Recorded 15 November 2021. Sarah Vigeland of the University of Wisconsin-Milwaukee presents "Supermassive Black Holes and Merging Galaxies: Low-Frequency Gravitational Wave Detection with Pulsar Timing Arrays" at IPAM's Workshop III: Source inference and parameter estimation in Gravitation
From playlist Workshop: Source inference and parameter estimation in Gravitational Wave Astronomy