The shear modulus of the neutron star crust and nonradial oscillations of neutron stars

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170231· OSTI ID:5318737

Strohmayer, T; Van horn, H M; Ogata, S; Iyetomi, H; Ichimaru, S ^[1]

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1. Rochester, University, NY (USA) Tokyo, University (Japan)

Shear moduli are calculated for bcc crystalline and rapidly quenched Coulomb solids produced by the Monte Carlo simulation method. The shear moduli are calculated up to the transition temperature and include the effects of thermal fluctuations. An effective shear modulus appropriate to an approximate 'isotropic' body is introduced. It is found that the values of the 'average shear modulus' for the quenched solids remain about the same as those for the corresponding bcc crystals, although the individual shear moduli of the former, disordered solids deviate considerably from the cubic symmetry of the latter. These results are applied to analyses of neutron star oscillations. It is found that the periods of the two interfacial modes are increased by about 10 percent compared to previous results, and that s-mode periods are increased by about 30 percent. The periods of the f and p modes are hardly affected at all. The surface g-mode periods are not greatly affected, while the t-mode periods are increased by 20-25 percent. 12 refs.

• OSTI ID: 5318737
• Journal Information: Astrophysical Journal; (United States), Vol. 375; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
NEUTRON STARS
OSCILLATIONS
MONTE CARLO METHOD
OSCILLATION MODES
SHEAR PROPERTIES
SOLIDS
TRANSITION TEMPERATURE
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
STARS
THERMODYNAMIC PROPERTIES
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources