Constraints on the nuclear symmetry energy via asteroseismology

Hajime Sotani, Ken'ichiro Nakazato, Kei Iida, Kazuhiro Oyamatsu

Research output: Contribution to journalConference articlepeer-review


We examine the fundamental torsional oscillations of the crust in the neutron star. Especially, we focus on the crystalline properties obtained from macroscopic nuclear models. As a result, we find that the frequencies of fundamental torsional oscillations are sensitive to the density dependence of the symmetry energy, but almost independent of the incompressibility of symmetric nuclear matter. Identifying the lowest frequency among the quasi-periodic oscillations observed in the giant flares as the fundamental ℓ = 2 torsional oscillations, we put constraints on the density derivative of the symmetry energy as L ≃ 50 MeV.

Original languageEnglish
Article number012016
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2013
Event15th Conference on Recent Developments in Gravity, NEB 2012 - Chania, Crete, Greece
Duration: Jun 20 2012Jun 23 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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