1,706 research outputs found
Lowest Order Constrained Variational Calculation of Structure Properties of Protoneutron Star
We calculate the structure properties of protoneutron star such as equation
of state, maximum mass, radius and temperature profile using the lowest order
constrained variational method. We show that the mass and radius of
protoneutron star decrease by decreasing both entropy and temperature. For the
protoneutron star, it is shown that the temperature is nearly constant in the
core and drops rapidly near the crust.Comment: 14 pages, 12 figures. Int. J. Theor. Phys. (2008) in pres
Calculation of the Structure Properties of a Strange Quark Star in the Presence of Strong Magnetic Field Using a Density Dependent Bag Constant
In this article we have calculated the structure properties of a strange
quark star in static model in the presence of a strong magnetic field using MIT
bag model with a density dependent bag constant. To parameterize the density
dependence of bag constant, we have used our results for the lowest order
constrained variational calculation of the asymmetric nuclear matter. By
calculating the equation of state of strange quark matter, we have shown that
the pressure of this system increases by increasing both density and magnetic
field. Finally, we have investigated the effect of density dependence of bag
constant on the structure properties of strange quark star.Comment: 23 pages, 9 figures, Res. in Astron. Astrophys. (2012) accepte
LOCV calculations for polarized liquid with the spin-dependent correlation
We have used the lowest order constrained variational (LOCV) method to
calculate some ground state properties of polarized liquid at zero
temperature with the spin-dependent correlation function employing the
Lennard-Jones and Aziz pair potentials. We have seen that the total energy of
polarized liquid increases by increasing polarization. For all
polarizations, it is shown that the total energy in the spin-dependent case is
lower than the spin-independent case. We have seen that the difference between
the energies of spin-dependent and spin-independent cases decreases by
increasing polarization. We have shown that the main contribution of the
potential energy comes from the spin-triplet state.Comment: 14 pages, 5 figures. Int. J. Mod. Phys. B (2008) in pres
Computation of the structure of magnetized strange quark star
In this work, we have calculated some properties of the spin polarized
strange quark matter (SQM) in a strong magnetic field at zero temperature using
the MIT bag model. We have shown that the equation of state of spin polarized
SQM is stiffer than that of the unpolarized case. We have also computed the
structure properties of the spin polarized strange quark star (SQS) and have
found that the presence of magnetic field leads to a more stable SQS compared
to the unpolarized SQS.Comment: 23 pages, 13 figures, 2 tables Res. Astron. Astrophys. (2011) in
pres
Saturation properties of nuclear matter in the presence of strong magnetic field
Different saturation properties of cold symmetric nuclear matter in the
strong magnetic field have been considered. We have seen that for magnetic
fields about , {for both cases with and without
nucleon anomalous magnetic moments}, the saturation density and saturation
energy grow by increasing the magnetic field. It is indicated that the magnetic
susceptibility of symmetric nuclear matter becomes negative showing the
diamagnetic response especially at . We have found
that for the nuclear matter, the magnitude of orbital magnetization reaches the
higher values comparing to the spin magnetization. Our results for the
incompressibility show that at high enough magnetic fields, i.e. , {the softening of equation of state caused by Landau
quantization is overwhelmed by stiffening due to the magnetization of nuclear
matter.} We have shown that the effects of strong magnetic field on nuclear
matter may affect the constraints on the equation of state of symmetric nuclear
matter obtained applying the experimental observable.Comment: 16 pages, 1 table, 7 figures, European Physical Journal A 52 (2016)
accepte
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