Science and Technology Production
Discontinuity g-modes of hybrid stars: effect of sequential phase transitions
Article
Authorship:
RODRIGUEZ, MARIA CAMILA ; Ranea Sandoval, I. F. ; Mariani, M. ; Malfatti, G. ; Guilera, O. M.Date:
2020Publishing House and Editing Place:
WILEY-V C H VERLAG GMBHMagazine:
ASTRONOMISCHE NACHRICHTEN WILEY-V C H VERLAG GMBHSummary *
The detection of event GW170817 and its electromagnetic counterpart started the era of multi-messenger astronomy with gravitational waves. The observational constraints from this event and the estimation of mass and radius of PSR J0030+0451 are being used to get insights related to the nature of matter inside these compact objects. In this work we construct hybrid equations of state using modern parametrisations of the relativistic mean field model for the outer core and a generalisation of the Constant Speed of Sound parametrisation that allow to study sharp sequential phase transitions in the inner core. Moreover, we study non-radial perturbations of these stellar configurations using the relativistic Cowling approximation. We focus our attention on the g-modes that arise due to the sharp phase transitions and show that, due to the second phase transition, a new g-mode appear, g 2 -mode, with frequencies smaller that ∼ 0.5 kHz. Information provided by the agent in SIGEVAKey Words
NEUTRON STARSGRAVITATIONAL WAVES