| Issue |
A&A
Volume 374, Number 1, July IV 2001
|
|
|---|---|---|
| Page(s) | 182 - 188 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20010710 | |
| Published online | 15 July 2001 | |
Population synthesis of pulsars: Magnetic field effects
Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France e-mail: pacheco@obs-nice.fr
Corresponding author: T. Regimbau, regimbau@obs-nice.fr
Received:
1
September
2000
Accepted:
26
April
2001
New results based on methods of population synthesis,
concerning magnetic field effects on the evolution of pulsars, are
reported.
The present study confirms that models with timescales for the
magnetic field decay longer than the pulsar lifetime are in better agreement
with the data. These new simulations indicate that the diagram 
alone cannot be used to test field decay models. The dispersion
of the values of the initial period and magnetic field can explain the observed
behaviour of the data points in such a diagram. The simulations also indicate
that the statistical properties of anomalous X-ray pulsars
and soft-gamma repeaters (magnetar candidates) are
compatible with those derived for objects born in the high side tail of
the magnetic field distribution. The predicted birth rate of neutron stars having field strengths in
excess of 1014 G is one object born each 750 yr.
Key words: pulsars / population synthesis / magnetars
© ESO, 2001
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