J/ApJ/416/276 Eq. of State in Magnetic Neutron Stars (Rognvaldsson+ 1993)
Thomas-Fermi calculations of atoms and matter in magnetic neutron
stars: effects of higher Landau bands
Rognvaldsson O.E., Fushiki I., Gudmundsson E.H., Pethick C.J.,
Yngvason J.
<Astrophys. J., 416, 276 (1993)>
=1993ApJ...416..276R 1993ApJ...416..276R
ADC_Keywords: Models, evolutionary; Atomic physics; Stars, variable
Keywords: Thomas-Fermi approximation; Landau levels; Neutron Stars
Description:
This catalog is based on the calculated equation of state in
cold dense matter. Each table in the catalog lists bulk
properties of Fe-56 in a magnetic field ranging from one
million to 1000 million Tesla.
Introduction:
We calculate the equation of state for cold dense matter in high
magnetic fields in the Thomas-Fermi approximation, taking all
Landau levels into account. Total energies and chemical
potentials for atoms and matter are also calculated, and we
present detailed profiles of the electron density as a function
of the distance from the atomic nucleus for various values of
the magnetic field strength and total matter density. The
profiles show a Landau shell structure, which for iron atoms at
low pressure is particularly pronounced for magnetic fields of
order 1011 G. In compressed matter this structure is reflected
in a high compressibility when the density is such that electrons
at the boundary of a unit shell start to occupy a new Landau
band. This leads to an oscillatory behavior of the density
gradient as a function of depth in the surface layers of magnetic
neutron stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
b10_0.dat 68 40 1 million (106) Tesla
b10_5.dat 68 46 3 million (106.5) Tesla
b11_0.dat 68 41 10 million (107) Tesla
b11_5.dat 68 42 30 million (107.5) Tesla
b12_0.dat 68 30 100 million (108) Tesla
b12_5.dat 68 27 300 million (108.5) Tesla
b13_0.dat 68 20 1000 million (109) Tesla
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Byte-by-byte Description of: *.dat
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Bytes Format Units Label Explanation
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1- 8 E8.2 kg/m3 density density of matter
10-20 E11.5 m radius radius of cell
22-32 E11.5 Pa pressure pressure
34-45 E12.5 keV eatom total energy of atom (in 1.602E-16J)
47-58 E12.5 keV chempot chemical potential (in 1.602E-16J)
59-68 F10.7 m zg12 depth.(surface gravity)/(10^12 m/s^2)
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References:
Astrophysical Journal, 416, 276, 1993.
(End) N. Paul Kuin 09-Jul-1996