A possible model of pulsar timing

A possible model of pulsar timing Biping Gong Collaborator Yaping Li KIAA Oct 19, 2012

quasi-periodic feature?

Possible mechanisms free precession exact period un-modeled companion Random processes quasi-periodic feature? multi-planets ?

Long-term orbital effects? Like the effect of free precession, it also predicts a periodic timing delay, without considering the motion of the orbital plane. geodetic precession of spin axis , BO equation

BO’s two-body equation negligible

AK’stwo-body equation(J=const) J=L+S=const （J=const ?） Just with the basic binary parameters like, orbital period, mass, and spin parameters like, spin angular momentum, we have the following results.

PSR B1540-06

PSR B1828-11

PSR B0919+06

PSR B1826-17

PSR J1931+2421

Companion star? Orbital period，0.20-0.34 hr Companion mass，0.16-0.68 solar mass • Are there binary pulsars with • orbital period less than 90min ? Spin angular momentum， -

4U 1626-67 an evidence of such a scenario?

Thanks!

A possible model of pulsar timing

A possible model of pulsar timing

Presentation Transcript

Detection of Gravitational Waves with Pulsar Timing

What Goes into a Pulsar Timing Model? David Nice Physics Department, Princeton University Pulsar Timing Array: A Nanohe

Update of the European Pulsar Timing Array

Tests of General Relativity with Pulsar Timing Arrays

Pulsar Timing and the Detection of Gravitational Waves

Pulsar Timing at Parkes

Pulsar Timing Arrays

The Parkes Pulsar Timing Array

Pulsar search and timing

Bayesian analysis for Pulsar Timing Arrays

Ten Years of Millisecond Pulsar Timing at Kalyazin

A model for pulsar nullings

Timing Model

Pulsar Timing and Galaxy Evolution

Pulsar physics and the application of pulsar timing

Pulsar Timing Phenomenology

The Parkes Pulsar Timing Array Project

Pulsar timing with tempo2

Gravitational Wave and Pulsar Timing

Pulsar Searching and Timing

Particle Outflow and Pulsar Timing Noise

Pulsar Timing