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Probing nuclear bubble structure via neutron star asteroseismology
Hajime Sotani, Kei Iida, Kazuhiro Oyamatsu
We consider torsional oscillations that are trapped in a layer of spherical-hole (bubble) nuclear structure, which is expected to occur in the deepest region of the inner crust of…
Gravitational wave asteroseismology with protoneutron stars
Hajime Sotani, Tomoya Takiwaki
We examine the time evolution of the frequencies of the gravitational wave after the bounce within the framework of relativistic linear perturbation theory using the results of one…
Empirical formula of crustal torsional oscillations
Hajime Sotani
Crustal torsional oscillations depend on not only crust properties but also the stellar mass and radius. Thus, one could extract stellar information by identifying the observed fre…
Low-mass neutron stars: universal relations, the nuclear symmetry energy and gravitational radiation
Hector O. Silva, Hajime Sotani, Emanuele Berti
The lowest neutron star masses currently measured are in the range , but these measurement have either large uncertainties or refer to isolated neutron stars. The…