Transition density and pressure in hot neutron stars

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.055805· OSTI ID:21389075

Jun, Xu ^[1]; Liewen, Chen ^[2]; Ko, Che Ming ^[3]; Baoan, Li ^[4]

---

1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843-3366 (United States)
2. Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
3. Cyclotron Institute and Department of Physics and Astronomy, Texas A and M University, College Station, Texas 77843-3366 (United States)
4. Department of Physics and Astronomy, Texas A and M University-Commerce, Commerce, Texas 75429-3011 (United States)

Using the momentum-dependent effective interaction (MDI) for nucleons, we have studied the transition density and pressure at the boundary between the inner crust and the liquid core of hot neutron stars. We find that their values are larger in neutrino-trapped neutron stars than in neutrino-free neutron stars. Furthermore, both are found to decrease with increasing temperature of a neutron star as well as increasing slope parameter of the nuclear symmetry energy, except that the transition pressure in neutrino-trapped neutron stars for the case of small symmetry energy slope parameter first increases and then decreases with increasing temperature. We have also studied the effect of the nuclear symmetry energy on the critical temperature above which the inner crust in a hot neutron star disappears and found that with increasing value of the symmetry energy slope parameter, the critical temperature decreases slightly in neutrino-trapped neutron stars but first decreases and then increases in neutrino-free neutron stars.

• OSTI ID: 21389075
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevC.81.055805; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CRITICAL TEMPERATURE
DENSITY
INTERACTIONS
LIQUIDS
NEUTRINOS
NEUTRON STARS
NUCLEONS
SYMMETRY
TRAPPING
BARYONS
ELEMENTARY PARTICLES
FERMIONS
FLUIDS
HADRONS
LEPTONS
MASSLESS PARTICLES
PHYSICAL PROPERTIES
STARS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE