
Physics 2013
Breaking the EOSGravity Degeneracy with Masses and Pulsating Frequencies of Neutron StarsDOI: 10.1088/09543899/41/7/075203 Abstract: A thorough understanding of many astrophysical phenomena associated with compact objects requires reliable knowledge about both the equation of state (EOS)of superdense nuclear matter and the theory of strongfield gravity simultaneously because of the EOSgravity degeneracy. Currently, variations of the neutron star (NS) massradius correlation from using alternative gravity theories are much larger than those from changing the NS matter EOS within known constraints. At least two independent observables are required to break the EOSgravity degeneracy. Using model EOSs for hybrid stars and a Yukawatype nonNewtonian gravity, we investigate both the massradius correlation and pulsating frequencies of NSs. While the maximum mass of NSs increases, the frequencies of the $f$, $p_1$, $p_2$, and $w_I$ pulsating modes are found to decrease with the increasing strength of the Yukawatype nonNewtonian gravity, providing a useful reference for future determination simultaneously of both the strongfield gravity and the supranuclear EOS by combining data of xray and gravitational wave emissions of neutron stars.
