Standard sirens have been the central paradigm in gravitational-wave (GW)
cosmology so far. From the GW signature of compact star binaries, it is
possible to directly measure the luminosity distance of the source.
Since the source redshift cannot be inferred from the GW signal alone,
additional information is required for instance from the observation of
an electromagnetic counterpart....
Unveiling the origin of the coalescing binaries detected via gravitational waves (GW) is challenging, notably if no multi-wavelength counterpart is detected. One important diagnostic tool is the coalescing binary distribution with respect to the large scale structures (LSS) of the universe, which one can quantify via the cross-correlation of galaxy catalogs with GW ones.
I will present...
Gravitational waves (GWs) from compact binary coalesces are cosmological standard sirens and provided with an electromagnetic (EM) counterpart can be used to probe cosmology. With the rapid increase of GW detector sensitivity, it will be less and less likely that GW sources are accompanied by an EM counterpart. Furthermore, the completeness of galaxy catalogs rapidly decreases and the...
The generation of primordial magnetic fields and its interaction with the primordial plasma during cosmological phase transitions is turbulent in nature. I will describe and discuss results of direct numerical simulations of magnetohydrodynamic (MHD) turbulence in the early universe and the resulting stochastic gravitational wave background (SGWB). In addition to the SGWB, the primordial...
The propagation of gravitational waves (GWs) at cosmological distances offers a new way to test the gravitational interaction at the largest scales. In this talk I will consider a homogeneous and isotropic cosmology with extra spatial dimensions at large scales, which represents a simple phenomenological prototype for extra-dimensional modified gravity cosmological models. By assuming that...
