Speaker
Dr
Shin Yoshida
(The University of Tokyo)
Description
We propose a new category of low frequency gravitational wave sources
related to mergers of double white dwarfs. A remnant just after a merger
is a rapidly and differentially rotating objects, which may develop
non-axisymmetric instability of hydrodynamical origin. If the remnant
is susceptible to the so-called 'low T/W' instability, m=2 (bar)
or m=1 (spiral) density pattern may develop (here m is the azimuthal quantum
number of perturbation) and the mass quadrupole may oscillate with
a typical frequency of O[0.1-1] Hz. We discuss the detectability of
newly-born remnants by the planned spaceborne gravitational wave
observatories targeting intermediate frequency range
such as DECIGO, Big Bang Observer, and TianQin.
Primary author
Dr
Shin Yoshida
(The University of Tokyo)
