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Astron. Astrophys. 335, 969-972 (1998)
The effect of interior magnetic field on the modified Urca process and the cooling of neutron stars *
Y.F. Yuan 1, 2 and
J.L. Zhang 2
1 CCAST (World Laboratory) P.O. Box 8730, Beijing 100080,
P.R. China
2 Center for Astrophysics, University of Science and
Technology of China, Hefei 230026, Anhui, P.R. China
(yuan@cfa.ustc.edu.cn; jlz@cfa.ustc.edu.cn)
Received 10 March 1998 / Accepted 25 March 1998
Abstract
The effect of a strong magnetic field on the modified Urca process
in neutron star cores is considered in this paper. It is found that
this effect is significant when the interior magnetic field is greater
than ![[FORMULA]](img1.gif)
G, especially at some resonant states. In
these situations, the strong magnetic field will significantly
increase the rate of neutrino emission and influence the cooling of
neutron stars. Comparing with the observational data, we provide
information about the order of the strength of interior magnetic field
for the first time. The strength we obtained is about
![[FORMULA]](img2.gif)
G.
Key words: dense
matter 
stars: magnetic
fields
stars: neutron
* This work is supported by the National Natural Science Foundation and National Climbing Programme on Fundamental Researches
Send offprint requests to: Y.F. Yuan, Center for Astrophysics, University of Science and Technology of China, Hefei 230026, China
Contents
- 1. Introduction
- 2. Modified Urca process in strong magnetic fields
- 3. Cooling curves of neutron stars
- 4. Conclusion and discussions
- References
© European Southern Observatory (ESO) 1998
Online publication: June 26, 1998
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