Millisecond Pulsars by Professor G Srinivasan

The First Millisecond Pulsar
The dog that did not bark!
But there was absolutely no nebulosity in radio or optical or x-ray!
Curious coincidence once again!
A bold conjecture!
Evolution of Pulsars
Recycled Pulsars
Hulse-Taylor Binary Pulsar
The Hulse-Taylor Binary Pulsar
Agatha Christie
Reincarnation of Pulsars
Spinning up a Neutron Star in a Binary System
What will be its period after the spin up phase is over?
The Equilibrium Period
Accretion disk
PSR 1913+16 must be a recycled pulsar
The Equilibrium Period
Question: For a given magnetic field, can we spin up a neutron star to arbitrarily small period?
Eddington Luminosity Limit
Eddington Limit for the Accretion Rate
The Minimum Equilibrium Period
The Hulse-Taylor Binary Pulsar
Predictions made by GS & van den Heuvel 1978,80
The 'second born' neutron star will be like any other 'ordinary' pulsar:
Predictions made in 1980
Astronomer's reaction !
The Double Pulsar: an odd couple!
Prediction made in 1980 confirmed
The First Millisecond Pulsar
A bold conjecture!
Recycled Pulsars
The solitary millisecond pulsar
The Millisecond Pulsar
The progenitors of millisecond pulsars
But where is the Companion !
The Population of ms-Pulsars
The Moral of Millisecond Pulsars
The large population of millisecond pulsars clearly tells us that the magnetic field of millisecond pulsars do not decay further.
Predictions made in 1986
Thirty years later
The missing companion of the solitary millisecond pulsar
Evolution of the Magnetic Field of Neutron Stars.
Any viable theory of field evolution must explain the following questions.
Origin of magnetic field of neutron stars
Field decay in Neutron Stars
Superfluid core
Type II superconductivity in the core
Type II Proton Superconductivity in the core
"Vortices" to the rescue!
Two types of "Spaghettis" in the core:
The inter-pinning of the fluxoids and vortices
Main results and predictions
Status of the predictions made in 1990
The skeptics:
The final nail in the coffin!
2000: X-ray binary & 2009: radio millisecond pulsar
PSR J1023+0038 - The missing link
Yet Another Puzzle of the 1980s
COS-B map of the galactic plane
The Puzzle
Is there a Puzzle?
A Prediction made in 1988
The high latitude emission may appear "Diffuse" because of the poor angular resolution of the telescope.
Twenty one years after this prediction was made. ...
"A population of Gamma-Ray Millisecond Pulsars Seen with the Fermi Large Area Telescope"
Millisecond Pulsars: A New Population of Gamma Ray Sources
Fermi Lat has detected gamma ray emission from nearly 100 millisecond pulsars
Gravitational radiation from ms-PSRs
Atomic Clocks and Millisecond Pulsars
ms-PSRs and Atomic Clocks
ms-PSRs as gravitational wave detectors
Pulsar Timing
Pulsar Timing Array
The trumpets shall sound, and the dead shall be raised incorruptible.
Q&A