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Effects of Superfluidity on Spheroidal Oscillations of Neutron Stars

Published online by Cambridge University Press:  12 April 2016

Umin Lee ,
T.J.B. Collins ,
H.M. Van Horn  and
R.I. Epstein
Umin Lee
Affiliation:
Department of Physics and Astronomy and C. E. Kenneth Mees Observatory, University of Rochester, Rochester, NY 14627-0011, U.S.A.
T.J.B. Collins
Affiliation:
Department of Physics and Astronomy and C. E. Kenneth Mees Observatory, University of Rochester, Rochester, NY 14627-0011, U.S.A.
H.M. Van Horn
Affiliation:
Department of Physics and Astronomy and C. E. Kenneth Mees Observatory, University of Rochester, Rochester, NY 14627-0011, U.S.A.
R.I. Epstein
Affiliation:
Los Alamos National Laboratory, MS D436, Los Alamos, NM 87545, U.S.A.

Abstract

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In the limit of short wavelengths, it has been shown that superfluidity significantly affects wave propagation in neutron stars. Here we abandon the short-wavelength restriction and extend these calculations to global oscillation modes. In the present analysis, the solid crust of the neutron star is divided into an outer crust and an inner crust, and a superfluid of neutrons coexists with the solid lattice in the inner crust. We have computed several low-order global spheroidal modes for l = 2 both with and without superfluidity. We find that superfluidity in the inner crust affects the frequency spectra of acoustic (p-) modes, shear (s-) modes, and interfacial (i-) modes, although the surface gravity (g-) modes are not affected at all.

Type
Posters
Information
International Astronomical Union Colloquium , Volume 147: The Equation of State in Astrophysics , 1994 , pp. 586 - 590
Copyright
Copyright © Cambridge University Press 1994

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