Small radii of neutron stars as an indication of novel in-medium effects

Regular Article - Theoretical Physics

Abstract

At present, neutron star radii from both observations and model predictions remain very uncertain. Whereas different models can predict a wide range of neutron star radii, it is not possible for most models to predict radii that are smaller than about 10km, thus if such small radii are established in the future they will be very difficult to reconcile with model estimates. By invoking a new term in the equation of state that enhances the energy density, but leaves the pressure unchanged we simulate the current uncertainty in the neutron star radii. This new term can be possibly due to the exchange of the weakly interacting light U-boson with appropriate in-medium parameters, which does not compromise the success of the conventional nuclear models. The validity of this new scheme will be tested eventually by more precise measurements of neutron star radii.

References

  1. 1.
    X.T. He, F.J. Fattoyev, B.A. Li, W.G. Newton, Phys. Rev. C 91, 015810 (2015).CrossRefADSGoogle Scholar
  2. 2.
    M.I. Krivoruchenko, F. Simkovic, A. Faessler, Phys. Rev. D 79, 125023 (2009).CrossRefADSGoogle Scholar
  3. 3.
    D.H. Wen, B.A. Li, L.W. Chen, Phys. Rev. Lett. 103, 211102 (2009).CrossRefADSGoogle Scholar
  4. 4.
    D.R. Zhang, P.L. Yin, W. Wang, Q.C. Wang, W.Z. Jiang, Phys. Rev. C 83, 035801 (2011).CrossRefADSGoogle Scholar
  5. 5.
    R.B. Wiringa, V. Fiks, A. Fabrocini, Phys. Rev. C 38, 1010 (1988).CrossRefADSGoogle Scholar
  6. 6.
    J.M. Lattimer, M. Prakash, Astrophys. J. 550, 426 (2001).CrossRefADSGoogle Scholar
  7. 7.
    J.M. Lattimer, M. Prakash, Phys. Rep. 442, 109 (2007).CrossRefADSGoogle Scholar
  8. 8.
    B.A. Li, A.W. Steiner, Phys. Lett. B 642, 436 (2006).CrossRefADSGoogle Scholar
  9. 9.
    W.Z. Jiang, B.A. Li, L.W. Chen, Phys. Lett. B 653, 184 (2007).CrossRefADSGoogle Scholar
  10. 10.
    B. Kämpfer, Phys. Lett. B 101, 366 (1981).CrossRefADSGoogle Scholar
  11. 11.
    N.K. Glendenning, C. Kettner, Astron. Astrophys. 353, L9 (2000).ADSGoogle Scholar
  12. 12.
    J. Schaffner-Bielich, M. Hanauske, H. Stöcker, C. Greiner, Phys. Rev. Lett. 89, 171101 (2002).CrossRefADSGoogle Scholar
  13. 13.
    M.C. Miller, arXiv/1312.0029.Google Scholar
  14. 14.
    P. Haensel, Astron. Astrophy. 380, 186 (2001).CrossRefADSGoogle Scholar
  15. 15.
    C.M. Zhang, H.X. Yin, Y. Kojima, H.K. Chang et al., Mon. Not. Roy. Astron. Soc. 374, 232 (2007).CrossRefADSGoogle Scholar
  16. 16.
    V. Suleimanov, J. Poutanen, M. Revnivtsev, K. Werner, Astrophys. J. 742, 122 (2011).CrossRefADSGoogle Scholar
  17. 17.
    A.W. Steiner, J.M. Lattimer, E.F. Brown, Astrophys. J. 722, 33 (2010).CrossRefADSGoogle Scholar
  18. 18.
    F. Özel, G. Baym, T. Guver, Phys. Rev. D 82, 101301 (2010).CrossRefADSGoogle Scholar
  19. 19.
    T. Güver, F. Özel, Astrophys. J. 765, L1 (2013).CrossRefADSGoogle Scholar
  20. 20.
    S. Guillot, M. Servillat, N.A. Webb, R.E. Rutledge, Astrophys. J. 772, 7 (2013).CrossRefADSGoogle Scholar
  21. 21.
    J.M. Lattimer, A.W. Steiner, Astrophys. J. 784, 123 (2014).CrossRefADSGoogle Scholar
  22. 22.
    A.W. Steiner, J.M. Lattimer, E.F. Brown, Astrophys. J. Lett. 765, L5 (2013).CrossRefADSGoogle Scholar
  23. 23.
    C.O. Heinke, H.N. Cohn, P.M. Lugger et al., Mon. Not. R. Astron. Soc. 444, 443 (2014).CrossRefADSGoogle Scholar
  24. 24.
    S. Guillot, R.E. Rutledge, Astrophys. J. 796, 1, L3 (2014).CrossRefADSGoogle Scholar
  25. 25.
    F. Özel, D. Psaltis, T. Güver, G. Baym, C. Heinke, S. Guillot, arXiv:1505.05155.
  26. 26.
    S. Bogdanov, Astrophys. J. 762, 96 (2013).CrossRefADSGoogle Scholar
  27. 27.
    J. Poutanen, J. Nättilä, J.J.E. Kajava et al., Mon. Not. R. Astron. Soc. 442, 3777 (2014).CrossRefADSGoogle Scholar
  28. 28.
    K. Hebeler, J.M. Lattimer, C.J. Pethick, A. Schwenk, Astrophys. J. 733, 11 (2013).CrossRefADSGoogle Scholar
  29. 29.
    P. Danielewicz, R. Lacey, W.G. Lynch, Science 298, 1592 (2002).CrossRefADSGoogle Scholar
  30. 30.
    P.B. Demorest, T. Pennucci, S.M. Ransom, M.S.E. Roberts, J.W.T. Hessels, Nature 467, 1081 (2010).CrossRefADSGoogle Scholar
  31. 31.
    J. Antoniadis, P.C.C. Freire, N. Wex et al., Science 340, 448 (2013).CrossRefADSGoogle Scholar
  32. 32.
    W.Z. Jiang, B.A. Li, L.W. Chen, Phys. Rev. C 76, 054314 (2007).CrossRefADSGoogle Scholar
  33. 33.
    J. Piekarewicz, Phys. Rev. C 69, 041301 (2004).CrossRefADSGoogle Scholar
  34. 34.
    M.B. Tsang, J.R. Stone, F. Camera et al., Phys. Rev. C 86, 015803 (2012).CrossRefADSGoogle Scholar
  35. 35.
    W.G. Newton, M. Gearheart, B.A. Li, Astrophys. J. Suppl. Ser. 204, 9 (2013).CrossRefADSGoogle Scholar
  36. 36.
    W.G. Newton, B.A. Li, Phys. Rev. C 80, 065809 (2009).CrossRefADSGoogle Scholar
  37. 37.
    A.W. Steiner, S. Gandolfi, Phys. Rev. Lett. 108, 081102 (2012).CrossRefADSGoogle Scholar
  38. 38.
    D.H. Wen, W.G. Newton, B.A. Li, Phys. Rev. C 85, 025801 (2012).CrossRefADSGoogle Scholar
  39. 39.
    J.M. Lattimer, Annu. Rev. Nucl. Part. Sci. 62, 485 (2012).CrossRefADSGoogle Scholar
  40. 40.
    B.A. Li, X. Han, Phys. Lett. B 727, 276 (2013).CrossRefADSGoogle Scholar
  41. 41.
    B.-A. Li, A. Ramos, G. Verde, I. Vidaña (Editors), Topical issue on nuclear symmetry energy, in The European Physical Journal A, Vol. 50 (2014).Google Scholar
  42. 42.
    B.-J. Cai, F.J. Fattoyev, B.-A. Li, W.G. Newton, Phys. Rev. C 92, 015802 (2015).CrossRefADSGoogle Scholar
  43. 43.
    L. Lindblom, Astrophys. J. 398, 569 (1992).CrossRefADSGoogle Scholar
  44. 44.
    W.-C. Chen, J. Piekarewicz, arXiv:1505.07436.
  45. 45.
    R. Brockmann, H. Toki, Phys. Rev. Lett. 68, 3408 (1992).CrossRefADSGoogle Scholar
  46. 46.
    R. Fritz, H. Müther, R. Machleidt, Phys. Rev. Lett. 71, 46 (1993).CrossRefADSGoogle Scholar
  47. 47.
    Z.Y. Ma, H.L. Shi, B.Q. Chen, Phys. Rev. C 50, 3170 (1994).CrossRefADSGoogle Scholar
  48. 48.
    P. Fayet, Phys. Lett. B 95, 285 (1980).CrossRefADSGoogle Scholar
  49. 49.
    P. Fayet, Phys. Lett. B 172, 363 (1986).MathSciNetCrossRefADSGoogle Scholar
  50. 50.
    P. Fayet, Nucl. Phys. B 347, 743 (1990).CrossRefADSGoogle Scholar
  51. 51.
    E. Fischbach, C.L. Talmadge, The Search for Non- Newtonian Gravity (Springer-Verlag, Inc., New York, 1999) ISBN 0-387-98490-9.Google Scholar
  52. 52.
    E.G. Adelberger et al., Annu. Rev. Nucl. Part. Sci. 53, 77 (2003).CrossRefADSGoogle Scholar
  53. 53.
    C. Boehm, D. Hooper, J. Silk, M. Casse, J. Paul, Phys. Rev. Lett. 92, 101301 (2004).CrossRefADSGoogle Scholar
  54. 54.
    C. Boehm, P. Fayet, Nucl. Phys. B 683, 219 (2004).CrossRefADSGoogle Scholar
  55. 55.
    N. Borodatchenkova, D. Choudhury, M. Drees, Phys. Rev. Lett. 96, 141802 (2006).CrossRefADSGoogle Scholar
  56. 56.
    S.H. Zhu, Phys. Rev. D 75, 115004 (2007).CrossRefADSGoogle Scholar
  57. 57.
    P. Fayet, Phys. Rev. D 75, 115017 (2007).CrossRefADSGoogle Scholar
  58. 58.
    P. Jean et al., Astron. Astrophys. 407, L55 (2003).CrossRefADSGoogle Scholar
  59. 59.
    J. Knodlseder et al., Astron. Astrophys. 411, L457 (2003).CrossRefADSGoogle Scholar
  60. 60.
    N. Prantzos, C. Boehm, A.M. Bykov et al., Rev. Mod. Phys. 83, 1001 (2011).CrossRefADSGoogle Scholar
  61. 61.
    J. Boguta, A.R. Bodmer, Nucl. Phys. A 292, 423 (1977).MathSciNetCrossRefADSGoogle Scholar

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of PhysicsSoutheast UniversityNanjingChina
  2. 2.Department of Physics and AstronomyTexas A&M University-CommerceCommerceUSA
  3. 3.Center for Exploration of Energy and MatterIndiana UniversityBloomingtonUSA

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