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Neutron stars: history of the magnetic field decay

Published online by Cambridge University Press:  20 March 2013

Andrei P. Igoshev  and
Alexander F. Kholtygin
Andrei P. Igoshev
Affiliation:
Institute of Astronomy, Saint Petersburg State University email: [email protected]
Alexander F. Kholtygin
Affiliation:
Institute of Astronomy, Saint Petersburg State University email: [email protected]
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Abstract

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Using the data of the ATNF pulsar catalog we study the relation connected the real age t of young neutron stars (NS) and their spin-down age τ. We suppose that this relation is independent from both initial period of the NS and its initial surface magnetic field, and that the laws of the surface magnetic field decay are similar for all NSs in the Milky Way. We further assume that the birth-rate of pulsars was constant during at least last 200 million years. With these assumptions we were able to restore the history of the magnetic field decay for the galactic NSs. We reconstruct the universal function f(t) = B(t)/B0, where B0 is the initial magnetic field and B(t) is the magnetic field of NS at the age t. The function f(t) can be fitted by a power law with power index α = −1.17.

Keywords

methods: data analysismethods: statisticalstars: neutronmagnetic fieldspulsars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 408 - 410
Copyright
Copyright © International Astronomical Union 2013

References

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