Statistics – Computation
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...217..137h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 217, no. 1-2, June 1989, p. 137-144.
Statistics
Computation
18
Computational Astrophysics, Neutron Stars, Phase Transformations, Quarks, Stellar Mass, Stellar Oscillations, Equations Of State, Pions, Stellar Envelopes
Scientific paper
The effect of possible phase transitions in dense matter (pion condensation, deconfinement of quarks) on radial pulsations of neutron stars is studied. If neutron star has a quark core then the main effect consists in damping of radial pulsations on a typical timescale of a fraction of second. In the case of a first order phase transition implied by pion condensation, a small pion condensed core can modify the spectrum of eigenfrequencies, the main effect being a significant decrease of the frequencies of the radial modes as compared to the case of a one-phase star of the same mass. Damping of radial pulsations, due to the presence of a pion condensed core, is expected to occur typically on a timescale of seconds and is due to the nonequilibrium processes taking place at the boundary of the pion condensed phase.
Haensel Pawel
Schaeffer Richard
Zdunik Leszek J.
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