Population synthesis of isolated Neutron Stars with magneto--rotational evolution

Abstract

We revisit the population synthesis of isolated radio-pulsars incorporating recent advances on the evolution of the magnetic field and the angle between the magnetic and rotational axes from new simulations of the magneto-thermal evolution and magnetosphere models, respectively. An interesting novelty in our approach is that we do not assume the existence of a death line. We discuss regions in parameter space that are more consistent with the observational data. In particular, we find that any broad distribution of birth spin periods with $P_0\lesssim 0.5$ s can fit the data, and that if the alignment angle is allowed to vary consistently with the torque model, realistic magnetospheric models are favoured compared to models with classical magneto-dipolar radiation losses. Assuming that the initial magnetic field is given by a lognormal distribution, our optimal model has mean strength $⟨\log B_0[\mathrm{G}]⟩\approx 13.0-13.2$ with width $\sigma (\log B_0)=0.6-0.7$. However, there are strong correlations between parameters. This degeneracy in the parameter space can be broken by an independent estimate of the pulsar birth rate or by future studies correlating this information with the population in other observational bands (X-rays and $\gamma$-rays).

10 pages, 9 figures, submitted and accepted to MNRAS, comments welcome

References in corpus (5)

• The ATNF Pulsar Catalogue
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• 2D Cooling of Magnetized Neutron Stars
• The population of pulsars with interpulses and the implications for beam evolution
• Population statistics study of radio and gamma-ray pulsars in the Galactic plane

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