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Reporter: Long Jiang Nanjing University

Structure of Spin Polarized S trange Q uark S tar in the Presence of Magnetic Field at Finite Temperature @arXiv 1301:0899. Reporter: Long Jiang Nanjing University. Outline. Introduction Why SQS Properties of SQS Background of this paper Equation of State Spin polarized

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Reporter: Long Jiang Nanjing University

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  1. Structure of Spin Polarized Strange Quark Star in the Presenceof Magnetic Field at Finite Temperature @arXiv 1301:0899 Reporter: Long Jiang Nanjing University

  2. Outline • Introduction Why SQS Properties of SQS Background of this paper • Equation of State Spin polarized In presence of strong magnetic field At finite temperature • Some results and discussion

  3. Introduction — Why SQS? • Landau’s neutron star • Witten: SQM stable than nuclei • Density: ~10^15 g/cm^3 • Mass: 2.1+-0.28Ms • Magnetar ( SGRs & AXPs) • CCO • XDIN

  4. Structure difference

  5. Mass-radius relationshipSQS VS NS

  6. Other Properties of SQS • Density of core & base of the crust • Ultra-high electric field: ~15% of mass • Ultra-high magnetic field: ~5% of mass • Rapid rotation • · · · Candidates: SAX J1808.4-3658, EXO 1785-248, 3C58 4U 1608-52, 4U 1820-30, RX J185635-3754

  7. Background of this paper • Influence of magnetic field Equation of State Maximum mass Gravitational red-shift • Used model: MIT bag model Density dependent bag constant: B

  8. Structure description Equation of State: p=?

  9. Equilibrium SQM: up, down, strange quarks & e

  10. To get the EoS (1) Polarization Number density Energy

  11. To get the EoS (2)

  12. Free energy VS polarization

  13. polarization VS baryonic density

  14. Polarization VS density

  15. Polarization VS magnetic field

  16. Free energy VS density

  17. Pressure VS density

  18. Gravitational mass VS energy density

  19. Gravitational mass VS radius

  20. Gravitational mass VS energy density

  21. Other results Max: Min: Near the red-shift of RX J185635-3754: zs ~ 0.35

  22. Thank you !!

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