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Abstract |
The direct detection of gravitational waves have opened up a new way to probe the Universe. In this talk, I
will discuss two different examples of how this discovery can motivate studies in various directions in
astroparticle physics. In the first part of the talk, we explore in detail the possibility that gravitational wave
signals from binary inspirals are affected by a new force that couples only to dark sector particles. We
discuss the impact of both the new force acting between the binary partners as well as radiation of the
force carrier. We show that any deviation from the predictions of general relativity observed in binary
inspirals must be due either to the material properties of the inspiraling objects themselves, such as a tidal
deformability, to a true fifth force coupled to baryons, or to a non-standard production mechanism for the
dark sector cores of neutron stars. In the second part of the talk, we will discuss the lensing of fast radio
bursts as a probe of primordial black holes and exotic compact boson stars and fermion stars. The
presence of a compact object near the line of sight produces two images of the radio burst. If the images
are sufficiently separated in time, this technique can constrain the presence of primordial black holes and
other exotic compact objects. This technique has the potential to provide leading constraints over a wide
range of masses \gtrssim 10 Msolar. |
