Gravitational waves induced by the asymmetric jets of gamma-ray bursts
  We study the gravitational wave (GW) production induced by the asymmetric
jets of gamma-ray bursts (GRBs). The asymmetric jets result in a recoil force
acted on the central compact object, whose motion leads to emission of GW.
Under reasonable assumptions and simplifications, we derive the analytic form
of the produce GWs. The amplitude of emitted GWs is estimated to be relatively
low, but possibility exists that they can be detected by future experiments
such as the Einstein Telescope. We find the dynamical properties of the central
object, which is difficult to be studied via the electromagnetic (EW) channel,
can be inferred by measuring the emitted GWs. Moreover, we find the emitted GWs
can be used determine whether the relativistic jets is launched by the neutrino
annihilation process or the Blandford-Znajek process, which cannot be clearly
distinguished by the current GRB observations. Our work manifests the
importance of the GW channel in multi-messenger astronomy. The physical
information encoded in the GW and EW emissions of an astrophysical object is
complementary to each other; in case some physics can not be effectively
investigated using the EW channel alone, including the GW channel can be very
helpful.
