Why the Spacetime Embedding Incompressible Cores of Pulsars Must Be Conformally Flat?

• 作者: Ahmad A. Hujeirat
• 来源期刊: 现代物理(英文)
• 学科: 地球科学
• 关键词: Relativity: Numerical General Black Hole Physics PULSARS Neutron Stars PULSARS SUPERFLUIDITY Superconductivity INCOMPRESSIBILITY GLUONS QUARKS Plasmas QCD
• 年，卷（期）: 2020,（11）
• 页码范围: 1779-1784
• 页数: 6页
• 分类号: P14

摘要

The multi-messenger observations of the merger event in GW170817 did not rule out the possibility that the remnant might be a dynamically stable neutron star with <img src="Edit_01b04c31-b94c-4b32-bd17-d6383ca16545.bmp" alt="" />. Based on this and other recent events, I argue that the universal maximum density hypothesis should be revived. Accordingly, the central densities in the cores of ultra-compact objects must be upper-limited by the critical density number <em>n</em>_<em>cr</em>, beyond which supranuclear dense matter becomes purely incompressible. Based on the spacetime-matter coupling in GR, it is shown that the topology of spacetime embedding incompressible quantum fluids with <em>n</em>=<em style="white-space:normal;">n</em><sub style="white-space:normal;"><em>cr </em></sub>must be Minkowski flat, which implies that spacetime at the background of ultra-compact objects should be bimetric.