Rotation at 1122 Hz and the neutron star structure

  title={Rotation at 1122 Hz and the neutron star structure},
  author={Michał Bejger and Paweł Haensel and Julian Leszek Zdunik},
  journal={Astronomy and Astrophysics},
Aims. Recent observations of XTE J1739-285 suggest that it contains a neutron star rotating at 1122 Hz. Such rotation imposes bounds on the structure of neutron star in XTE J1739-285. These bounds may be used to constrain poorly known equation of state of dense matter at densities ${\ga} 10^{15}~{\rm g~cm^{-3}}$. Methods. One-parameter families of stationary configurations rotating rigidly at 1122 Hz are constructed, using a precise 2D code solving Einstein equations. Hydrostatic equilibrium… 

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