Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..895..228u&link_type=abstract
FIFTY YEARS OF ROMANIAN ASTROPHYSICS. AIP Conference Proceedings, Volume 895, pp. 228-233 (2007).
Astronomy and Astrophysics
Astrophysics
Neutron Stars, Thermodynamic Processes, Conduction, Convection, Equations Of State
Scientific paper
In order to compute the internal structure of a neutron star and its space-time geometry, the unified equation of state obtained by Douchin and Haensel is used. The results are given in graphical form, in which the variations of mass and of radius are given as functions of central density and of dimensionless central pressure. The last one is a measure of the strength of gravitational field. The numerical results are in good agreement with those obtained by Douchin and Haensel. The maximum mass, reached at the central density 2.8 . 1018 kg . m-3, is 2.09 MSun, the corresponding radius is 9.85 km and the dimensionless central pressure is 0.53. The space-time geometry inside the neutron star and in its neighborhood is studied. The coefficients, which give the proper time and the radial distance, are determined.
Oproiu Tiberiu
Roman Rodica
Ureche Vasile
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