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The missing compact star of SN1987A: a solid quark star?

Published online by Cambridge University Press:  20 March 2013

X. W. Liu ,
J. D. Liang ,
R. X. Xu ,
J. L. Han  and
G. J. Qiao
X. W. Liu
Affiliation:
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China email: [email protected]
J. D. Liang
Affiliation:
Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
R. X. Xu
Affiliation:
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China email: [email protected]
J. L. Han
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
G. J. Qiao
Affiliation:
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China email: [email protected]
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Abstract

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To investigate the missing compact star of Supernova 1987A, we analyzed the cooling and heating processes of a possible compact star based on the upper limit of observational X-ray luminosity. From the cooling process, we found that a solid quark-cluster star (SQS), having a stiffer equation of state than that of a conventional liquid quark star, has a heat capacity much smaller than a neutron star. The SQS can cool down quickly, naturally explaining the non-detection of a point source in X-ray wavelengths. On the other hand, we considered the heating processes due to magnetospheric activity and possible accretion and obtained some constraints on the parameters of a possible pulsar. Therefore, we concluded that a SQS can explain the observational limit in a confident parameter space. As a possible central compact object, the pulsar parameter constraints can be tested for SN1987A with advanced, future facilities.

Keywords

pulsar: general – elementary particles – supernovae – star: neutron
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. 448 - 450
Copyright
Copyright © International Astronomical Union 2013

References

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