| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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PSR J1614-2230 May Include Hyperons |
| YU Zi1**, DING Wen-Bo2, BAO Tmurbagan3, LIU Ning-Ning4
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1The College of Science, Nanjing Forestry University, Nanjing 210037
2Department of Physics, Bohai University, Jinzhou 121000
3College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061
4Department of Basic Course, Nanjing Institute of Technology, Nanjing 211167
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YU Zi, DING Wen-Bo, BAO Tmurbagan et al 2011 Chin. Phys. Lett. 28 089701 |
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Abstract In the framework of the relativistic mean field theory, it is found that recently discovered PSR J1614-2230 with mass of 1.97±0.04Mʘ may include hyperons when the weakly interacting light boson (WILB) is considered. To describe PSR J1614−2230 with the equation of state (EOS) including hyperons, the characteristic scale of the WILB (g2/μ2) should lie in the range of 13–46 (24–46) GeV−2 with the weak (strong) hyperon-hyperon (YY) interaction. The measurements of inertial momentum and the total neutrino luminosity of the neutron star could be used to further constrain the characteristic scale of the WILB. Before more stringent constraint on the WILB is given, the mass measurement of the neutron star could not exclude any soft EOS.
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| Keywords:
97.60.Jd
26.60.+c
21.65.+f
21.30.Fe
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Received: 14 April 2011
Published: 28 July 2011
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