1–5 Jul 2019
Geological Museum
Europe/Copenhagen timezone

Double white dwarf merger remnants as low frequency gravitational wave sources

5 Jul 2019, 12:10
20m
Main Auditorium (Geological Museum)

Main Auditorium

Geological Museum

Øster Voldgade 5-7 DK-1350 Copenhagen

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)

Presentation materials

There are no materials yet.