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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 ?.

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A possible model of pulsar timing

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

  2. quasi-periodic feature?

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

  4. 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

  5. BO’s two-body equation negligible

  6. 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.

  7. PSR B1540-06

  8. PSR B1828-11

  9. PSR B0919+06

  10. PSR B1826-17

  11. PSR J1931+2421

  12. 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, -

  13. 4U 1626-67 an evidence of such a scenario?

  14. Thanks!

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