The apparent decay of pulsar magnetic fields
arXiv:1711.05081 · doi:10.1088/1742-6596/932/1/012044
Abstract
Neutron stars are extremely strong cosmic magnets which fields are expected to decay with time. Here we report on the simple test of this process. Adopting a novel approach, we have estimated surface magnetic fields for 76 radiopulsars (the most numerous subclass of the known isolated neutron stars) which ages are known independently. Focusing on the accurate evaluation of the precision of both quantities, we determined a significant power-law trend with index at 95\% C.L. The effects of the observational selection turn this value into the upper limit for the intrinsic field decay rate. If so, then neutron star crusts are close to the "impurity-free crystals", which results in a relatively slow magnetic fields decay.
arXiv comment5 pages, 3 figures. To appear in the Open Access Journal of Physics: Conference Series (JPCS). Based on the talk made at "Physics of Neutron Stars -- 2017", July 10 -- 14, Saint Petersburg, Russia
References in corpus (11)
- Unifying the observational diversity of isolated neutron stars via magneto-thermal evolution models
- 2D Cooling of Magnetized Neutron Stars
- Pulsar Spin-Velocity Alignment: Kinematic Ages, Birth Periods and Braking Indices
- Population synthesis of isolated Neutron Stars with magneto--rotational evolution
- Initial spin periods of neutron stars in supernova remnants
- Evidence for Heating of Neutron Stars by Magnetic Field Decay
- Electron thermal conductivity owing to collisions between degenerate electrons
- Modified pulsar current analysis: probing magnetic field evolution
- Magnetic field estimates for accreting neutron stars in massive binary systems and models of magnetic field decay
- Refinement of the timing-based estimator of pulsar magnetic fields
- Statistical ages and the cooling rate of X-ray dim isolated neutron stars