Comparison of pulsar parameters for some anomalous types. (arXiv:2004.08229v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Malov_I/0/1/0/all/0/1">I.F.Malov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Marozava_H/0/1/0/all/0/1">H.P.Marozava</a>
The comparative analysis of parameters is carried out for two samples of
radio pulsars. Objects of the first sample have periods P > 2 sec, the second
is characterized by magnetic fields at the neutron star surface $Bs >
4.4times10^{13}$ G. The main goal of this analysis is to find some differences
between normal pulsars and anomalous X-ray pulsars (AXP) and soft gamma-ray
repeaters (SGR) with the similar values of periods and magnetic fields. It is
shown that the dependence of period derivatives on periods for pulsars with
long periods is $dP/dt propto P^{1.67}$. This means that we must search for
another braking mechanism differing from the magnetic dipole one which gives
$dP/dt propto P^{-1}$ or use some specific distributions of parameters. On the
other hand, radio pulsars with strong magnetic fields and AXP/SGR can be
described by the magnetic dipole model. Radio pulsars with P > 2 sec have ages
on average two orders of magnitude higher than objects with $Bs > 4.4 times
10^{13}$ G and are located much higher above the Galactic plane. The obtained
results show that the main feature of AXP/SGR is the strong magnetic field and
not the large period.
The comparative analysis of parameters is carried out for two samples of
radio pulsars. Objects of the first sample have periods P > 2 sec, the second
is characterized by magnetic fields at the neutron star surface $Bs >
4.4times10^{13}$ G. The main goal of this analysis is to find some differences
between normal pulsars and anomalous X-ray pulsars (AXP) and soft gamma-ray
repeaters (SGR) with the similar values of periods and magnetic fields. It is
shown that the dependence of period derivatives on periods for pulsars with
long periods is $dP/dt propto P^{1.67}$. This means that we must search for
another braking mechanism differing from the magnetic dipole one which gives
$dP/dt propto P^{-1}$ or use some specific distributions of parameters. On the
other hand, radio pulsars with strong magnetic fields and AXP/SGR can be
described by the magnetic dipole model. Radio pulsars with P > 2 sec have ages
on average two orders of magnitude higher than objects with $Bs > 4.4 times
10^{13}$ G and are located much higher above the Galactic plane. The obtained
results show that the main feature of AXP/SGR is the strong magnetic field and
not the large period.
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