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🔗 Source: acta.astrouw.edu.pl
📊 Size: 295 KB
📄 Pages: 31 pages
⬇️ Downloads: 67

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Researchers compared the Hartle-Thorne model of neutron stars with its Kerr approximation using the resonant switch model to match twin high-frequency quasi-periodic oscillations data from the 4U 1636-53 source. The best Hartle-Thorne matches fixed one variant of the resonant switch model, excluded rotation frequency 290 Hz, and restricted equations of state to six, excluding strange quark stars. The Kerr matching allowed two variants, giving false information, and only three equations of state, giving insufficient information. The results showed the Kerr approximation can be used only for neutron stars with reduced quadrupole moment q < 2, and the resonant switch model is sufficient to determine the spacetime metric by fitting to the data. The best matches determined the neutron star parameters to be mass ≈2.10-2.13 M⊙, spin ≈0.21-0.25, and reduced quadrupole moment ≈1.8-2.3.

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Researchers compared the Hartle-Thorne model of neutron stars with its Kerr approximation using the resonant switch model to match twin high-frequency...

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  • File Format: PDF
  • File Size: 295 KB
  • Pages: 31
  • Language: EN
  • Total Downloads: 67
  • Last Updated: 3 weeks ago

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