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Unifying the observational diversity of isolated neutron stars via magneto-thermal evolution models
Viganò, D.; Rea, N.; Pons, J. A.; Perna, R.; Aguilera, D. N.; Miralles, J. A.
AA(Departament de Física Aplicada, Universitat d'Alacant, Ap. Correus 99, E-03080 Alacant, Spain; ), AB(Institute of Space Sciences (CSIC-IEEC), Campus UAB, Faculty of Science, Torre C5-parell, E-08193 Barcelona, Spain), AC(Departament de Física Aplicada, Universitat d'Alacant, Ap. Correus 99, E-03080 Alacant, Spain), AD(Department of Astrophysical and Planetary Sciences and JILA, University of Colorado, 440 UCB, Boulder, CO 80309, USA), AE(Laboratorio Tandar, Comisión Nacional de Energía Atómica, Av. Gral Paz 1499, 1630 San Martin, Buenos Aires, Argentina), AF(Departament de Física Aplicada, Universitat d'Alacant, Ap. Correus 99, E-03080 Alacant, Spain)
Monthly Notices of the Royal Astronomical Society, Volume 434, Issue 1, p.123-141 (MNRAS Homepage)
Publication Date:
Astronomy Keywords:
stars: magnetic field, stars: neutron, X-rays: stars
Abstract Copyright:
2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Bibliographic Code:


Observations of magnetars and some of the high magnetic field pulsars have shown that their thermal luminosity is systematically higher than that of classical radio-pulsars, thus confirming the idea that magnetic fields are involved in their X-ray emission. Here we present the results of 2D simulations of the fully coupled evolution of temperature and magnetic field in neutron stars, including the state-of-the-art kinetic coefficients and, for the first time, the important effect of the Hall term. After gathering and thoroughly re-analysing in a consistent way all the best available data on isolated, thermally emitting neutron stars, we compare our theoretical models to a data sample of 40 sources. We find that our evolutionary models can explain the phenomenological diversity of magnetars, high-B radio-pulsars, and isolated nearby neutron stars by only varying their initial magnetic field, mass and envelope composition. Nearly all sources appear to follow the expectations of the standard theoretical models. Finally, we discuss the expected outburst rates and the evolutionary links between different classes. Our results constitute a major step towards the grand unification of the isolated neutron star zoo.
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