J/A+A/559/A128 Neutron star properties with unified EoS (Fantina+, 2013)
Neutron star properties with unified equations of state of dense matter.
Fantina A.F., Chamel N., Pearson J.M., Goriely S.
<Astron. Astrophys. 559, A128 (2013)>
=2013A&A...559A.128F 2013A&A...559A.128F
ADC_Keywords: Models ; Pulsars
Keywords: stars: neutron - equation of state - gravitation - dense matter -
methods: numerical
Abstract:
We study the global properties of neutron stars obtained with the
Brussels-Montreal equations of state (EoSs). These EoSs, which provide
a unified description of all regions of a neutron star, are based on
the generalised Skyrme functionals BSk19, BSk20, and BSk21.
The neutron-star properties thus obtained are compared with various
astrophysical observations.
We find that only the stiffest EoS, based on the functional BSk21, is
at least marginally compatible with all the constraints inferred from
these observations.
Description:
Three unified EoSs for neutron-star matter, reflecting the current
lack of knowledge of the high-density matter, are presented.
For each EoS (BSk19, BSk20, and BSk21), the baryon number density, the
mass-energy density, and the pressure are given.
The EoSs are given up to the maximum baryon number density consistent
with causality (i.e. requiring that the speed of sound remains lower
than the speed of light).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
eosbsk19.dat 54 1285 Baryon number and mass-energy densities, pressure
for equation of state BSk19
eosbsk20.dat 54 994 Baryon number and mass-energy densities, pressure
for equation of state BSk20
eosbsk21.dat 54 1108 Baryon number and mass-energy densities, pressure
for equation of state BSk21
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See also:
J/A+A/560/A48 : Neutron-star matter unified EoS FORTRAN codes (Potekhin+, 2013
Byte-by-byte Description of file: eosbsk19.dat eosbsk20.dat eosbsk21.dat
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Bytes Format Units Label Explanations
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1- 16 E16.8 fm-3 nb Baryon number density (particles/fm3)
20- 35 E16.8 Mg/m3 rho Mass-energy density ρ (1)
39- 54 E16.8 dPa P Pressure (2)
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Note (1): The SI unit Mg/m3 is equivalent to the CGS unit g/cm3.
Note (2): The SI unit dPa is equivalent to the CGS unit erg/cm3 or
equivalent to dyn/cm2.
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Acknowledgements:
Anthea F. Fantina, afantina(at)ulb.ac.be,
IAA, Universite Libre de Bruxelles
References:
Goriely, Chamel, & Pearson, 2010PhRvC..82c5804G 2010PhRvC..82c5804G
Pearson, Goriely, & Chamel, 2011PhRvC..83f5810P 2011PhRvC..83f5810P
Pearson, Chamel, Goriely, & Ducoin, 2012PhRvC..85f5803P 2012PhRvC..85f5803P
(End) A. Fantina [IAA, Univ. Libre de Bruxelles], P. Vannier [CDS] 25-Oct-2013