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Seven pulsars in binary systems above the spin-up line

Published online by Cambridge University Press:  20 March 2013

Y. Y. Pan  and
N. Wang
Y. Y. Pan
Affiliation:
Xinjiang Astronomical Observatories, Chinese Academy of Sciences, Xinjiang 830011, China email: panyuanyue@xao.ac.cn
N. Wang
Affiliation:
Xinjiang Astronomical Observatories, Chinese Academy of Sciences, Xinjiang 830011, China email: panyuanyue@xao.ac.cn
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Abstract

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Using data from the ATNF pulsar catalogue, 186 binary pulsars are shown in the magnetic field versus spin period (B-P) diagram, and their relationship to the spin-up line is investigated. Generally speaking, pulsars in binary systems should be below the spin-up line when they get enough accretion mass from their companions. It is found that there are seven binary pulsars above the spin-up line. Based on the parameters of these seven binary systems, we describe possible reasons why they are above the spin-up line.

Keywords

Pulsarbinaryspin-up line
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. 462 - 464
Copyright
Copyright © International Astronomical Union 2013

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