2023/02/03(Fri)
11:30 -12:00
五樓第一會議室 5F, 1st Meeting Room
視訊演講 Video Seminar [ Meeting Link / ID: 2513 419 1045 / Password: p6islife ]
Title
f-mode imprint in coalescing binaries involving a rapidly rotating neutron star
Speaker
官顥叡博士 (Albert Einstein Institute, Germany) Dr. Hao-Jui Kuan (Albert Einstein Institute, Germany)Abstract
The morphology of gravitational waveforms depends on almost all source parameters, and thus encodes a bunch of information about the radiating objects. In particular, tidal parameters of neutron stars may stringently constrain the nuclear equation of state, thus their precise estimation is of fundamental importance. Emphasizing the tidal phase shift by aligned, rotating stars, we provide an accurate, yet economical, method to generate ????-mode-involved, pre-merger waveforms. We find for slow-rotating stars that the dephasing effects of the dynamical tides can be uniquely, equation-of-state-independently determined by the direct observables. In addition, for binaries with fast rotating
members, the dephasing due to ????-mode is larger than that caused by equilibrium tides by a factor of ∼5, which may lead to a considerably overestimated tidal deformability if the dynamical tidal contribution is not accounted for. The influence of inclination angles of stellar spins will be discussed also, as well as the possibility of accompanying pre-cursors flares associated with ????-mode excitation.
Language
演講語言 (Language): in English
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