We present results on the effect of the stiffness of the equation of state on dynamical bar-mode instability in rapidly rotating polytropic models of neutron stars in full General Relativity. We determine the change on the threshold for the emergence of the instability when the adiabatic Γ index is changed from 2 to 2.75 to mimic the behavior of realistic equation of state. We also extend the analysis to low value of the instability parameter β to check for the presence of low-β or shearing instabilities.
Stiffness effects on the dynamics of bar-mode instability in full General Relativity / F., Loeffler; DE PIETRI, Roberto; Feo, Alessandra; Franci, Luca. - In: BULLETIN OF THE AMERICAN PHYSICAL SOCIETY. - ISSN 0003-0503. - ELETTRONICO. - 58:4(2013), pp. 14009-14009. (Intervento presentato al convegno APS April Meeting 2013 tenutosi a Denver, Colorado nel April 13–16, 2013).
Stiffness effects on the dynamics of bar-mode instability in full General Relativity
DE PIETRI, Roberto;FEO, Alessandra;FRANCI, Luca
2013-01-01
Abstract
We present results on the effect of the stiffness of the equation of state on dynamical bar-mode instability in rapidly rotating polytropic models of neutron stars in full General Relativity. We determine the change on the threshold for the emergence of the instability when the adiabatic Γ index is changed from 2 to 2.75 to mimic the behavior of realistic equation of state. We also extend the analysis to low value of the instability parameter β to check for the presence of low-β or shearing instabilities.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
