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

  • X. W. Liu (a1), J. D. Liang (a2), R. X. Xu (a1), J. L. Han (a3) and G. J. Qiao (a1)...

Abstract

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.

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References

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Keywords

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

  • X. W. Liu (a1), J. D. Liang (a2), R. X. Xu (a1), J. L. Han (a3) and G. J. Qiao (a1)...

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