Population synthesis of isolated neutron stars with magneto-rotational evolution

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Title: Population synthesis of isolated neutron stars with magneto-rotational evolution
Authors: Gullón Juanes, Miguel | Miralles, Juan A. | Viganò, Daniele | Pons, José A.
Research Group/s: Astrofísica Relativista
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada
Keywords: Stars: magnetic field | Stars: neutron | Pulsars: general
Knowledge Area: Astronomía y Astrofísica
Issue Date: 25-Jul-2014
Publisher: Oxford University Press
Citation: Monthly Notices of the Royal Astronomical Society. 2014, 443(3): 1891-1899. doi:10.1093/mnras/stu1253
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 P0 ≲ 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 B0[G]〉 ≈ 13.0–13.2 with width σ(log B0) = 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 γ-rays).
Sponsor: This work was supported in part by the grants AYA 2010-21097-C03-02 and Prometeo/2009/103, and by the New Compstar COST action MP1304. MG is supported by the fellowship BES-2011-049123. DV is supported by the grants AYA2012-39303 and SGR2009-811.
URI: http://hdl.handle.net/10045/40569
ISSN: 0035-8711 (Print) | 1365-2966 (Online)
DOI: 10.1093/mnras/stu1253
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1093/mnras/stu1253
Appears in Collections:INV - Astrofísica Relativista - Artículos de Revistas

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