Wednesday, November 21, 2012

1211.4689 (S. Caliskan et al.)

On The Evolution of The Radio Pulsar PSR J1734-3333    [PDF]

S. Caliskan, U. Ertan, M. A. Alpar, J. E. Truemper, N. D. Kylafis
Recent measurements showed that the period derivative of the `high-B' radio pulsar PSR J1734-3333 is increasing with time. For neutron stars evolving with fallback disks, this rotational behavior is expected in certain phases of the long-term evolution. Using the same model as employed earlier to explain the evolution of anomalous X-ray pulsars and soft gamma-ray repeaters, we show that the period, the first and second period derivatives and the X-ray luminosity of this source can simultaneously acquire the observed values for a neutron star evolving with a fallback disk. We find that the required strength of the dipole field that can produce the source properties is in the range of $ 1 - 5 \times 10^{12}$ G on the pole of the neutron star. When the model source reaches the current state properties of PSR J1734-3333, accretion onto the star is not allowed yet, since the inner disk is not able to penetrate the light cylinder in this phase, allowing the source to operate as a regular radio pulsar. Our results imply that PSR J1734-3333 is at an age of $\sim 3 \times 10^4$ years. Such sources will have properties like the X-ray dim neutron stars or transient AXPs at a later epoch of weak accretion from the diminished fallback disk.
View original: http://arxiv.org/abs/1211.4689

No comments:

Post a Comment